Guide to safe scaffolding

A Guide to
Safe Scaffolding
N. C. Department of Labor
Occupational Safety and Health Division
1101 Mail Service Center
Raleigh, NC 27699- 1101
Cherie Berry
Commissioner of Labor
38
N. C. Department of Labor
Occupational Safety and Health Program
Cherie Berry
Commissioner of Labor
OSHA State Plan Designee
Allen McNeely
Deputy Commissioner for Safety and Health
Kevin Beauregard
Assistant Deputy Commissioner for Safety and Health
Bobby R. Davis
Reviewer
Acknowledgments
A Guide to Safe Scaffolding was initially prepared for the N. C. Department of Labor by David L. Potts. Mr. Potts has
written extensively about subjects regarding construction safety and is a recognized authority in safe scaffolding. The
information in this guide was updated in 2001.
_____
The N. C. Department of Labor is grateful to the Scaffolding Industry Association for permission to use the illustrations
in this guide.
_____
This guide is intended to be consistent with all existing OSHA standards; therefore, if an area is considered by the
reader to be inconsistent with a standard, then the OSHA standard should be followed.
To obtain additional copies of this guide, or if you have questions about North Carolina occupational safety and health stan-dards
or rules, please contact:
N. C. Department of Labor
Education, Training and Technical Assistance Bureau
1101 Mail Service Center
Raleigh, NC 27699- 1101
Phone: ( 919) 807- 2875 or 1- 800- NC- LABOR ( 1- 800- 625- 2267)
____________________
Additional sources of information are listed on the inside back cover of this guide.
____________________
The projected cost of the NCDOL OSH program for federal fiscal year 2008– 2009 is $ 17,042,662. Federal funding provides approximately 30 percent ($ 4,090,400) of
this total.
Reviewed 8/ 08
Contents
Part Page
Foreword . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1iiv
1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ivi1
2 Policy for Safe Scaffold Erection and Use . . . . . . . . . . . . . . . . . . ii12
3 Illustrations of Selected Types of Scaffolds . . . . . . . . . . . . . . . . . ii16
4 Types of Scaffolding and Information . . . . . . . . . . . . . . . . . . . . ii22
Glossary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ii30
References . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ii32
iii
Foreword
Scaffolding can provide an efficient and safe means to perform work. However, unsafe scaffolding procedures can lead
to accidents, serious injuries and death. This guide makes clear that planning ahead for the erection, use and dismantling
of scaffolding can substantially reduce scaffold- related accidents and injuries. Compliance with the manufacturer’s
instructions, the use of this guide and compliance with all scaffolding standards will help ensure a safer workplace for
employees.
Safety and health in the workplace is everyone’s responsibility. Employers must be aware of workplace hazards facing
their workers, and they must take appropriate action to minimize or eliminate exposure to these hazards. Workers are
responsible for following the policies, procedures and training requirements established by their employers. A Guide to
Safe Scaffolding discusses precautions that can prevent serious accidents and protect workers against fall injuries and
fatalities.
N. C. Department of Labor inspectors enforce the federal Occupational Safety and Health Act through a state plan
approved by the U. S. Department of Labor. The N. C. Department of Labor’s Occupational Safety and Health Division
offers many educational programs to the public and produces publications, including this guide, to help inform people
about their rights and responsibilities regarding occupational safety and health.
OSHA puts great emphasis on efforts to help citizens find ways to create safe and healthy workplaces. Everyone prof-its
from working together for safety. Reading and understanding A Guide to Safe Scaffolding will help you form sound
occupational safety and health practices where you work.
Cherie Berry
Commissioner of Labor
v
1
Introduction
Scaffolding has a variety of applications. It is used in construction, alteration, routine maintenance and
renovation. Scaffolding offers a safer and more comfortable work arrangement compared to leaning over
edges, stretching overhead and working from ladders. Suitable and sufficient scaffolding must be sup-plied
for work at elevations that cannot be accomplished safely by other means. Properly erected and
maintained, scaffolding provides workers safe access to work locations, level and stable working plat-forms,
and temporary storage for tools and materials for performing immediate tasks.
Accidents involving scaffolding mainly involve people falling, incorrect operating procedures, environ-mental
conditions and falling materials caused by equipment failure. The causes of scaffolding accidents
include failures at attachment points, parts failure, inadequate fall protection, improper construction or
work rules, and changing environmental conditions ( high winds, temperature extremes or the presence of
toxic gases). Additionally, overloading of scaffolding is a frequent cause of major scaffold failure.
Individuals exposed to scaffolding hazards include scaffold erectors and dismantlers, personnel work-ing
on scaffolds, and employees and the general public near scaffolding. Scaffold erectors and dismantlers
are at particular risk, since they work on scaffolds before ladders, guardrails, platforms and planks are
completely installed.
This guide IS NOT INTENDED to be a guideline for compliance with all pertinent regulations enforced
under the Occupational Safety and Health Act of North Carolina, but rather an overview of safe practices
in scaffolding procedures. Though the guide is not intended to be inconsistent with adopted standards, if
an area is considered by the reader to be inconsistent, the applicable standard should be followed.
1
2
Policy for Safe Scaffold Erection and Use
Safe scaffold erection and use should begin by developing policy and work rules. Policy and work rules
should concentrate on:
• sound design
• selecting the right scaffold for the job
• assigning personnel
• training
• fall protection
• guidelines for proper erection
• guidelines for use
• guidelines for alteration and dismantling
• inspections
• maintenance and storage
Sources of information for policy development and work rules include OSHA and ANSI standards, scaf-fold
trade associations, scaffolding suppliers, and safety and engineering consultation services.
Sound Design
The scaffold should be capable of supporting its own weight and at least four times the maximum
intended load to be applied or transmitted to the scaffold and components. Suspension ropes should be
capable of supporting six times the maximum intended load. Guardrails should be able to withstand at
least 200 pounds of force on the top rail and 100 pounds on the midrail. On complex systems, the services
of an engineer may be needed to determine the loads at particular points.
Selecting the Right Scaffold for the Job
You cannot contract away the responsibility for selecting the right scaffold for your job. But if you do
contract for scaffolding:
• Choose a scaffold supplier, rental agency and/ or erector who is thoroughly knowledgeable about the
equipment needed and its safe use.
• Obtain the owner’s manual prepared by the scaffolding manufacturer, which states equipment limi-tations,
special warnings, intended use and maintenance requirements.
If you are to select your own scaffold, begin by reviewing the written requirements ( blueprints, work
orders, etc.) to determine where scaffolds should be used and the type of scaffolding needed. Make sure
that the scaffolds meet all government and voluntary requirements. Consider that scaffolds are generally
rated light, medium and heavy duty. Light duty scaffolds can support a limited number of employees and
hand tools. Medium duty scaffolds must be capable of safely holding workers, hand tools and the weight
of construction materials being installed. Heavy duty scaffolds are needed when the scaffold must sustain
workers, tools and the weight of stored materials.
Account for any special features of the building structure in relationship to the scaffold, including dis-tinctive
site conditions. Factor these considerations into your policy:
• experience of erection and working personnel
• length and kind of work tasks to be performed
2
• weight of loads to be supported
• hazards to people working on and near the scaffolding
• needed fall protection
• material hoists
• rescue equipment ( particularly for suspended scaffolds)
• weather and environmental conditions
• availability of scaffolding, components, etc.
Assigning Personnel
Assign a competent person to oversee the scaffold selection, erection, use, movement, alteration, dis-mantling,
maintenance and inspection. Only assign trained and experienced personnel to work on scaf-folding.
Be certain they are knowledgeable about the type of scaffolding to be used and about the proper
selection, care and use of fall protection equipment ( perimeter protection, fall protection/ work positioning
belts and full harnesses, lanyards, lifelines, rope grabs, shock absorbers, etc.).
Training
Employees should receive instruction on the particular types of scaffolds that they are to use.
Training should focus on proper erection, handling, use, inspection, removal and care of the scaffolds.
Training must also include the installation of fall protection, particularly guardrails, and the proper
selection, use and care of fall arrest equipment.
The competent person( s) should receive additional training regarding the selection of scaffolds, recogni-tion
of site conditions, scaffold hazard recognition, protection of exposed personnel and the public, repair
and replacement options, and requirements of standards.
Site management personnel should also be familiar with correct scaffolding procedures so they can bet-ter
determine needs and identify deficiencies.
Fall Protection
Guardrails must be installed on all scaffold platforms in accordance with required standards and at
least consist of top rails, midrails and toeboards ( if more than 10 feet above the ground or floor). The top
edge height of toprails or equivalent member on supported scaffolds manufactured or placed in service
after Jan. 1, 2000, shall be installed between 38" and 45" above the platform surface. The top edge height
on supported scaffolds manufactured and placed in service before Jan. 1, 2000, and on all suspended scaf-folds
where both a guardrail and a personal fall arrest system are required shall be between 36" and 45".
When it is necessary to remove guardrails ( for example, to off- load materials), supervision must ensure
that they are replaced quickly.
Hard hats should be worn to protect against falling objects. Mesh, screens, intermediate vertical mem-bers
or solid panels should be used to safeguard employees and the public at lower levels. Ground- level
safety can be further provided by erecting canopies; by prohibiting entry into the fall hazard area by poli-cy,
barricades and signs; and by the proper placement of materials, tools and equipment on scaffolding.
Workers on suspended scaffolds must use a fall arrest system as protection against the failure of the
scaffold or its components. This system will usually consist of a full body harness, lanyard, rope grab,
independent vertical lifeline and an independent lifeline anchorage.
The full body harness is a belt system designed to distribute the impact energy of a fall over the shoul-ders,
thighs and buttocks. A properly designed harness will permit prolonged worker suspension after a
fall without restricting blood flow, which may cause internal injuries. Rescue is also aided because of the
upright positioning of the worker.
3
A lanyard connects the safety harness to the rope grab on the lifeline. Materials should be made of 5⁄ 8"
nylon rope or nylon webbing. Lanyards shall be kept as short as possible to limit fall distance or rigged
such that an employee can never free fall more than six feet.
Rope grabs contain a cam device that locks onto a lifeline when there is a hard tug or pull on the lan-yard.
Care must be taken to ensure that rope grabs are properly connected to lifelines so the cam will
work correctly. Rope grabs should be placed at the highest point on the lifeline to reduce the fall distance
and unintentional disengagement.
Independent vertical lifelines ( not scaffold suspension lines) of fiber rope should be used for each per-son
working on the suspended scaffold. In the presence of flame or heat, wire rope lifelines should be used
with lanyards containing shock absorbers. Vertical lifelines should extend from the anchorage point to
the ground or a safe landing place above the ground.
It is important to remember that fall protection is only as good as its anchorage. The anchorage points
are independent points on structures where lifelines are securely attached. These points must be able to
support at least 5,000 pounds per employee and preferably 5,400 pounds for a fall of up to six feet or
3,000 pounds for a fall of two feet or less.
General Guidelines for Proper Erection
Accidents and injuries can be reduced when the guidelines in this section are followed.
Supervise the erection of scaffolding. This must be done by a person competent by skill, experience and
training to ensure safe installation according to the manufacturer’s specifications and other requirements.
Know the voltage of energized power lines. Ensure increased awareness of location of energized power
lines; maintain safe clearance between scaffolds and power lines ( i. e., minimum distance of 3' for insulat-ed
lines less than 300 volts; 10' for insulated lines 300 volts or more). Identify heat sources like steam
pipes. Anticipate the presence of hazards before erecting scaffolds and keep a safe distance from them.
Be sure that fall protection equipment is available before beginning erection and use it as needed.
Have scaffolding material delivered as close to the erection site as possible to minimize the need for man-ual
handling. Arrange components in the order of erection.
Ensure the availability of material hoisting and rigging equipment to lift components to the erection
point and eliminate the need to climb with components. Examine all scaffold components prior to erec-tion.
Return and tag “ Do Not Use” or destroy defective components.
Prohibit or restrict the intermixing of manufactured scaffold components, unless: ( 1) the components fit
together properly, without force, ( 2) the use of dissimilar metals will not reduce strength, and ( 3) the
design load capacities are maintained.
All scaffold decks should be planked as fully as possible ( beginning at the work surface face) with gaps
between planks no more than 1" wide ( to account for plank warp and wane). ( Figure 1 shows types of
planking.) The remaining space on bearer member ( between the last plank and guardrail) cannot exceed
91⁄ 2" ( the space required to install an additional plank). Guardrail systems are not required on the build-ing
side when the platform is less than 16" from the building, except for suspended scaffolds where the
maximum distance is 12". In addition, scaffold setbacks will depend upon the needs of the trade. As an
example, masons require the scaffold platform to be as close to the wall as possible ( within 6"), while lath-ers
and plasterers using spraying apparatus must stand back ( and prefer a setback distance of at least
18"). Platform units must not extend less than 6" over their supports unless they are cleated or contain
hooks or other restraining devices. When platform units are abutted together or overlapped to make a
long platform, each end should rest on a separate support or equivalent support. Wood preservatives, fire
retardant finishes and slip- resistant finishes can be applied to platform units; however, no coating should
obscure the top and bottom of wooden surfaces. If fire retardants are used, an engineer should ensure
that the plank( s) will carry the required load since fire retardants can reduce the plank load capacity.
Provide suitable access to and between scaffolds ( see figure 4). Access can be provided by portable lad-ders;
hook- on ladders; attachable ladders; stairway- type ladders; integral prefabricated scaffold rungs;
4
direct passage from another scaffold, structure or personnel hoist; ramps; runways; or similar adequate
means. Crossbraces and scaffold frames shall not be used for access scaffold platforms unless they are
equipped with a built- in ladder specifically designed for such purpose. All ladders in use must meet
OSHA specifications, designed according to standards and secured against displacement. The bottom
steps of ladders must not be more than two feet from the supporting level. Rest platforms are recom-mended
for at least every 30– 36' of elevation. When direct access is used, spacing between scaffold and
another surface should be no more than 14" horizontally and 2 feet vertically.
Additional recommendations for the erection of supported scaffolds, suspension scaffolds, fabricated
frame scaffolds, outrigger scaffolds, etc., are also described in this booklet.
Guidelines for Use
• Be certain that scaffolds and components are not loaded beyond their rated and maximum capaci-ties.
• Prohibit the movement of scaffolds when employees are on them.
• Maintain a safe distance from energized power lines.
• Prohibit work on scaffolds until snow, ice and other materials that could cause slipping and falls are
removed.
• Protect suspension ropes from contact with sources of heat ( welding, cutting, etc.) and from acids
and other corrosive substances.
• Prohibit scaffold use during storms and high winds.
• Remove debris and unnecessary materials from scaffold platforms.
• Prohibit the use of ladders and other devices to increase working heights on platforms.
Guidelines for Alteration and Dismantling
• Require that scaffolds be altered, moved and dismantled under the supervision of a competent person.
• Alteration and dismantling activities should be planned and performed with the same care as with
erection.
• Tag any incomplete scaffold or damaged component out of service.
Inspections
Inspect all scaffolds and components upon receipt at the erection location. Return, tag “ Do Not Use” or
destroy defective components. Inspect scaffolds before use and attach a tag stating the time and date of
inspection.
Inspect scaffolds before each workshift and especially after changing weather conditions and pro-longed
interruptions of work. Check for such items as solid foundations, stable conditions, complete
working and rest platforms, suitable anchorage points, required guardrails, loose connections, tie- off
points, damaged components, proper access, and the use of fall protection equipment.
Maintenance and Storage
Maintain scaffolds in good repair. Only replacement components from the original manufacturer should
be used. Intermixing scaffold components from different manufacturers should be avoided. Fabricated scaf-folds
should be repaired according to the manufacturer’s specifications and guidance. Job- built scaffolds
should not be repaired without the supervision of a competent person.
Store all scaffolding parts in an organized manner in a dry and protected environment. Examine all
parts and clean, repair or dispose of them as necessary.
5
3
Illustrations of Selected Types of Scaffolds
Illustrations in this part offer the reader a general pictorial representation of selected types of scaffolds
which are addressed by standards enforced under the Occupational Safety and Health Act of North
Carolina ( OSHANC standards). The reader must not rely upon the illustrations to determine safety
requirements or safe use of the equipment for any particular installation situation. Rather, the reader
should refer to the appropriate OSHANC standard and related tables for specific information. The illus-trations
reference the OSHANC standards ( 29 CFR 1926 applies to the construction industry and 29 CFR
1910 applies to general industry).
Illustrations in this part were provided by the Scaffolding Industry Association. The illustrations are
not intended by the N. C. Department of Labor or the Scaffolding Industry Association to endorse any spe-cific
product, design or installation.
Figure 1
Scaffolding Work Surfaces [ 29 CFR 1926.451( a); 29 CFR 1910.28( a)]
6
LAMINATED
VENEER
LUMBER
( LVL)
SCAFFOLD PLANKS
SOLID
SAWN
LUMBER
FABRICATED
SCAFFOLD
DECK
FABRICATED
SCAFFOLD
PLANK
STAGE
PLATFORM
DECORATOR
PLANK
WOOD
SCAFFOLD
PLANK
MODULAR
STAGE
PLATFORM
METAL
SCAFFOLD
PLANK
Figure 2
Wood Pole Scaffold [ 29 CFR 1926.452( a); 29 CFR 1910.28( b)]
Figure 3
Tube and Coupler Scaffold [ 29 CFR 1926.452( b); 29 CFR 1910.28( c)]
7
POLE
PLANKED LEVELS
BEARER
GUARDRAIL SYSTEM
ACCESS LADDER
RUNNER
DIAGONAL BRACING
GUARDRAIL SYSTEM
WITH TOEBOARDS
PLANKING
RIGID
CLAMP
SWIVEL
CLAMP
RUNNER
BEARER
POST
TYPICAL
JOINT
CONNECTION
CROSS-BRACING
DIAGONAL BRACE
SILL
BASE PLATE
Figure 4
Fabricated Frame Scaffold ( Tubular Welded Frame Scaffold) [ 29 CFR 1926.452( c); 29 CFR 1910.28( d)]
and Scaffold Access ( Ladder or Equivalent) [ 29 CFR 1926.451( e); 29 CFR 1910.28( a)( 12)]
8
INTERNAL STAIR UNIT
GUARDRAIL
HANDRAIL SYSTEM
CROSSBRACE
STEP UNIT
FRAME or
PANEL
ACCESS
GATE
INTERMEDIATE
LEVEL
TOEBOARDS
FRAME
or
PANEL
ACCESS
LADDER
BRACKET
ATTACHMENT
COUPLER
EXTERNAL LADDERS
BUILT- IN ATTACHABLE
Figure 5
Manually Propelled Mobile Scaffold ( Fabricated Tubular Frame) [ 29 CFR 1926.452( w); 29 CFR 1910.29]
9
WORK
PLATFORM
GUARDRAIL SYSTEM
ACCESS
GATE
END
FRAME
LOCKING
PINS
CROSS-BRACING
TOEBOARD
COUPLER
ACCESS
LADDER
LOCKING
CASTERS
CASTER FASTENING PINS
HORIZONTAL
DIAGONAL
BRACE
Figure 6
Examples of Vehicle- Mounted Elevating and Rotating Aerial Devices ( covered by ANSI A92.2)
[ 29 CFR 1926.453]
10
VEHICLE- MOUNTED AERIAL PLATFORM WITH
TELESCOPING AND ROTATING BOOM
VEHICLE- MOUNTED AERIAL PLATFORM
( SCISSOR TYPE)
Figure 7
Outrigger Scaffold [ 29 CFR 1926.452( i); 29 CFR 1910.28( e)]
11
THIS END
RIGIDLY SECURED
OUTRIGGER BEAM BLOCKED
FOR LATERAL SUPPORT
Figure 8
Mason’s Adjustable Multiple- point Suspension Scaffold ( With Winding Drum Hoists)
[ 29 CFR 1926.452( q); 29 CFR 1910.28( f)]
12
ALTERNATE BOLT & SPECIAL
ANCHOR IMBEDDED IN CONCRETE
AT TIME OF POUR
ANCHORAGE SYSTEM
BUILDING
TYPICAL SUPPORT FOR STEEL
STRUCTURAL STEEL
OVERHEAD PROTECTION
GUARDRAIL
SYSTEM
WITH SCREEN
Figure 9
( Swinging Scaffold) Two- point Suspension [ 29 CFR 1926.452( p); 29 CFR 1910.28( g)]
13
COUNTERWEIGHTS
TIEBACK
COUNTERWEIGHTS
TIEBACK
TIEBACKS
OUTRIGGER
BEAM
ROLLING
OUTRIGGER BEAM
SECOND
WIRE ROPE
WOOD
BLOCKING
ROOF HOOK
SUSPENSION
WIRE ROPES
PARAPET CLAMP
SUSPENSION
WIRE ROPE
SUSPENSION
WIRE ROPE
SUSPENSION
WIRE ROPES
PLATFORM
PLATFORM
MODULAR PLATFORM
POWERED TRACTION HOIST
GUARDRAIL SYSTEM WITH SCREEN & TOEBOARDS
GUARDRAIL SYSTEM WITH TOEBOARDS
POWER WINDING DRUM HOIST
GUARDRAIL SYSTEM WITH
TOEBOARDS
MANUAL WINDING DRUM HOIST
Figure 10
Multiple- point Suspension Scaffold [ 29 CFR 1926.452( q)]
14
INDEPENDENT LINE
HOIST
LINE
GUARDRAIL
SYSTEM
STAGE
HOIST
Figure 11
Multi- level Suspension Scaffold With Powered Hoists [ 29 CFR 1926.452( v)]
15
SECOND WIRE ROPE
LANYARD ATTACHED TO TROLLY LINE
GUARDRAIL
SYSTEM
GUARDRAIL
SYSTEM
SUSPENSION
WIRE ROPE
HOISTING
MACHINE
PLATFORM
UNITS
Figure 12
Stone Setters’ Adjustable Multiple- point Suspension Scaffold
( With Manual Winding Drum Hoists) [ 29 CFR 1926.452( q); 29 CFR 1910.28( h)]
Figure 13
Single- point Adjustable Suspension Scaffolds ( Work Cages)
[ 29 CFR 1926.452( o); 29 CFR 1910.28( i)]
16
HOIST LINE
OUTSIDE WIRE ROPE
TOPRAIL
GUARDRAIL
BRACKETS
MIDRAIL
INSIDE WIRE
ROPE
OPERATING
HANDLE
GUIDE
CLAMP
ROLLER BUNTER
TOEBOARD
PLATFORM CORNER BRACE
BOLT
WIRE ROPE
GUIDE WHEEL
PUTLOG HINGE BOLT
PUTLOG
END GUARDRAIL
SYSTEM
TOPRAIL
MIDRAIL
INTERMEDIATE
GUARDRAIL
SUPPORT
GUARDRAIL
SUPPORT
TOEBOARD
END BRACKET
END GUARDRAIL
SYSTEM
PLATFORM SIDERAIL
POWER TRACTION HOIST
WORK CAGE
POWER TRACTION HOIST
WORK CAGE WITH EXTENSIONS
W
SINGLE POINT SUSPENSION
SCAFFOLD WINDING DRUM HOIST
Figure 14
Single- point Adjustable Suspension Scaffold Boatswain’s Chairs
[ 29 CFR 1926.452( o); 29 CFR 1910.28( j)]
Figure 15
Form Scaffold Carpenter’s Bracket Scaffold ( Metal)
[ 29 CFR 1926.452( g); 29 CFR 1910.28( k)]
17
BOATSWAIN CHAIR
POWERED
BOATSWAIN CHAIR
MANUAL
WALL STUD
GUARDRAIL
POST
LOCATION
THRU BOLT
Figure 18
Needle Beam Scaffold ( Structural Member Above) [ 29 CFR 1926.452( u); 29 CFR 1910.28( n)]
18
BEARERS
LEGS
CORNER
BRACES
LIGHT DUTY 8' MAX
MEDIUM DUTY 5' MAX
PLATFORM
NEEDLE BEAM
ROPES
Figure 16
Bricklayer’s Square Scaffold
[ 29 CFR 1926.452( e)]
Figure 17
Horse Scaffold
[ 29 CFR 1926.452( f); 29 CFR 1910.28( m)]
Figure 19
Interior Hung Scaffold [ 29 CFR 1926.452( t); 29 CFR 1910.28( p)]
Figure 20
Catenary Scaffold [ 29 CFR 1910.28( g); 29 CFR 1926.452( r)]
19
BUILDING
STRUCTURAL MEMBER
SUPPORTING ROPE
( ALTERNATE TUBE & COUPLER)
PLANK
BEARER
STRUCTURE ABOVE
PLATFORM
VERTICAL PICKUPS
ANCHORED
WIRE ROPE
ANCHORED
HOOK STOPS
20
Figure 21
Ladder Jack Scaffold [ 29 CFR 1926.452( k); 29 CFR 1910.28( q)]
Figure 22
Window Jack Scaffold [ 29 CFR 1926.452( l); 29 CFR 1910.28( r)]
OVERHANG
PLANK
HEAVY- DUTY
LADDER
LENGTH OF FABRICATED
PLANK VARIES
LADDER JACK
( SECURE PLANK TO BOTH
LADDER JACKS)
SECURE TOP AND
BOTTOM OF BOTH
LADDERS
HEIGHT
JACK INSTALLED ON SIDE
OF LADDER TOWARD
SURFACE
JACK INSTALLED ON SIDE
OF LADDER AWAY FROM
SURFACE
UPPERMOST USABLE
RUNG— SECOND
HIGHEST
BUILDING
STRUCTURE
ANCHOR
WINDOW OPENING
Figure 23
Float or Ship Scaffold [ 29 CFR 1926.452( s); 29 CFR 1910.28( u)]
Figure 24
Pump Jack Scaffold [ 29 CFR 1926.452( j)]
21
STRUCTURAL MEMBER
SUPPORT ROPE
EDGE PROTECTION
DECK WITH BRACING
POLE
BRACE
END
GUARDRAIL
SYSTEM
WORK PLATFORM
PUMP JACK
BRACKET
BRACE
MUD SILLS
TOEBOARD
MIDRAIL
WORKBENCH
( GUARDRAIL)
POLE
STRUCTURE
22
4
Types of Scaffolds and Information Regarding Their Use
There are many different types of scaffolds, each with unique features. Because of this distinctiveness,
procedures for safe erection and use maybe unique to the particular scaffold. Guidelines for several scaf-folds
are offered in this part. They are grouped under three categories: self- supporting scaffolds, suspen-sion
scaffolds and special use scaffolds.
Self- Supporting Scaffolds
A self- supporting scaffold is one or more work platforms supported from below by outriggers, brackets,
poles, legs, uprights, posts, frames or similar supports.
General Requirements
Confirm that scaffold and assembly are capable of supporting their own weight and at least four times
the maximum intended load applied or transmitted to the scaffold and components. Ensure that poles,
legs, posts, frames and uprights bear on base plates and mud sills or other adequately firm foundations.
Footings must be level, sound and able to support the loaded scaffold without settlement or displacement.
Plumb or brace poles, legs, posts, frames and uprights to prevent swaying or displacement.
Any supported scaffold with a height of more than four times the minimum width of the base must be
restrained from tipping by guying, tying, bracing or other suitable means. Restraints are needed for every
26' ( vertically), with the top restraint as close to the top platform as possible ( but not further from the top
than four times the least base dimension).
Fabricated Frame
A fabricated frame scaffold ( tubular welded frame scaffold) is a supported scaffold consisting of a plat-form(
s) supported on fabricated end frames with integral posts, horizontal bearers and intermediate
members ( see figure 4).
Frames and panels must be supported by cross, horizontal or diagonal braces, or a mixture of braces, to
stabilize vertical members. Crossbraces should be long enough to square and align vertical members, to
produce an erect scaffold that is plumb, level and square. Brace connections must be securely fastened.
Frames and panels must be connected vertically by coupling, stacking pins, or equal means. Brackets sup-porting
cantilevered loads must be seated with side- brackets parallel to the frames and end- brackets at 90
degrees to the frames. If loads are to be placed on a platform extension, the scaffold must be restrained
from tipping and putlogs or knee brace extensions must be used. ( Excessive loads on side brackets could
cause a frame leg failure.) Existing platforms must be left in place until new end frames have been placed
and braced, prior to moving the platforms to the next level. Scaffolds over 125' high must be designed by a
registered professional engineer and be constructed and loaded consistent with the design.
Tube and Coupler
A tube and coupler scaffold is a supported scaffold consisting of platforms supported by individual
pieces of tubing, erected with coupling devices connecting uprights, braces, bearers and runners ( see fig-ure
3). A registered professional engineer may need to be consulted about the design, construction, and
loading of the scaffold. Tube and coupler scaffolds over 125' high must be designed by a registered profes-sional
engineer and be constructed and loaded consistent with the design.
Transverse bracing forming an “ X” across the width of the scaffold must be installed at the scaffold
ends and at least at every third set of posts horizontally ( measured from only one end) and every fourth
runner vertically. Bracing must extend diagonally from the inner or outer posts or runners upward to the
next outer or inner posts or runners. Building ties must be installed at the bearer levels between the
transverse bracing and must conform to the requirements of 1926.451( c)( 1). This bracing must be placed
for each section of six levels between the fourth and sixth levels. The bracing must extend diagonally
from the inner or outer posts or runners at the bottom of the fourth level, upward to the inner or outer
posts or runners at the bottom of the fifth level, and likewise to the sixth level. If this technique is used,
the scaffold should be tied at the “ k” function level.
On straight run scaffolds, longitudinal bracing across the inner and outer rows of posts must be
installed diagonally in both directions and must extend from the base of the end posts upward to the top
of the scaffold at approximately a 45 degree angle. When the length of the scaffold is greater than the
height, such bracing must be repeated starting at least with every fifth post. When the length is shorter
than the height, such bracing must be installed from the base of end posts upward to the opposite end
posts and then in alternating directions until the top of the scaffold is reached.
In situations where the attachment of bracing to posts is precluded, the bracing must be attached to
the runners. Bearers must be installed transversely between the posts, and when coupled to the posts,
the inboard coupler must bear directly on the runner coupler. When the bearers are coupled to the run-ners,
the couplers must be as close to the posts as possible. Bearers must extend beyond the posts and
runners and provide full contact with the coupler.
The scaffold must have runners installed along its length along both the inside and outside posts at the
various level heights. Runners must be interlocked on straight runs to create continuous lengths and be
coupled to each post. Bottom runners should be located as close to the base as possible. Couplers must be
made of structural metal. When platforms are being moved to the next level, the existing platform must
be left undisturbed until new bearers have been set in place and braced prior to receiving the new plat-forms.
Mobile
A mobile scaffold is a powered or nonpowered, portable, caster or wheel- mounted supported scaffold
( see figure 5). Mobile scaffolds constructed of tube and coupler components or of fabricated frames must
conform to design, construction and loading requirements for those scaffolds. The scaffolds must be
braced by cross, horizontal or diagonal braces, or combination thereof, to prevent racking or collapse; ver-tical
members must be secured together laterally so that vertical members are squared and aligned.
Cross, horizontal or diagonal braces, or a combination, must be used to prevent collapse and secure verti-cal
members laterally so that vertical members are squared and aligned.
Scaffolds must be plumb, level and squared. All brace connections must be secured. Platforms should
not extend past the base supports unless outrigger frames or equivalent devices are used to ensure stabil-ity.
A rolling scaffold load capacity is also limited by the weight its casters can support. Platforms should
not extend past the base supports unless outrigger frames are used. A rolling scaffold load capacity is also
limited by the weight its casters can support.
Caster and wheel stems must be pinned or otherwise secured in scaffold legs. While in a stationary
position, casters and wheels must be locked with a positive wheel and/ or wheel and swivel locks, or equiv-alent
means, to prevent movement.
Employees should not be allowed to ride on a mobile scaffold unless strict controls are followed ( level
and unobstructed surfaces, a height ratio to width of not more than two to one, slow speed of movement,
confinement of employees within the scaffold frame, etc.) When manual force is used to move the scaffold,
the force should be applied as close to the base as practicable, but not more than 5' above the supporting
surface ( i. e., scaffold base or wheels when a powered system is used). Powered systems used to propel
mobile scaffolds must be designed for such use. Forklifts, trucks, similar motor vehicles or add- on motors
should not be used to propel scaffolds unless the scaffold is designed for such propulsion systems.
Pole Scaffold
A single pole scaffold is a supported scaffold consisting of platforms resting on bearers, the outside
ends of which are supported on runners ( ledgers or ribbons) secured to a single row of posts or uprights,
and the inner ends of which are supported on or in a structure or building wall. A double pole ( indepen-dent
pole) scaffold is a supported scaffold consisting of platforms resting on cross beams supported by
ledgers and a double row of uprights independent of support ( except for ties, guys and braces) from any
structure.
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On double pole scaffolds, crossbracing must be installed between the inner and outer sets of poles ( see
figure 2). Diagonal bracing in both directions must be installed across the entire outside face of double-pole
scaffolds used to support loads equivalent to a uniformly distributed load of 50 pounds or more per
square foot.
On both double and single pole scaffolds, diagonal bracing must be installed across the entire outside
face. Runners and bearers shall be installed on the edges ( e. g., narrow side on a 2" x 4", the edge would be
the 2" side). Bearers must extend a maximum of 3" over the outside edges of runners. Runners must
extend over a minimum of two poles and be supported by bearing blocks securely attached to the poles.
Braces, bearers and runners cannot be spliced between poles. Where wooden poles are spliced, the ends
must be squared and the upper sections must rest squarely on the lower sections. When platforms are
being moved to the next level, the existing platforms must be left undisturbed until the new bearers have
been set in place and braced, prior to receiving the new platforms.
Pole scaffolds over 60' in height must be designed by a registered professional engineer and must be
constructed and loaded in accordance with that design.
Bricklayer’s Square
A bricklayer’s square scaffold is a supported scaffold composed of framed squares that support a plat-form
( see figure 16). These types scaffolds must not exceed three tiers in height and be so constructed and
arranged that one square rests directly above the other.
Scaffolds made of wood must be reinforced with gussets on both sides of each corner. Diagonal braces
must also be installed between squares on the rear and front sides of the scaffold and must extend from
the bottom of each square to the top of the next square. The upper tiers of the scaffold must stand on a
continuous row of planks laid across the next lower tier and nailed down or otherwise secured to prevent
displacement.
Suspension Scaffolds
A suspension scaffold is one or more platforms suspended by ropes or other non- rigid means from an
overhead structure( s).
General Requirements
Each scaffold and scaffold component must be capable of supporting, without failure, its own weight
and at least four times the maximum intended load applied or transmitted to it. Each suspension rope,
including connecting hardware, used on non- adjustable suspension scaffold must be capable of support-ing,
without failure, at least six times the maximum intended load applied or transmitted to that rope.
The stall load of any scaffold must not exceed three times its rated load.
Criteria for suspension scaffolds. All suspension scaffold support devices must rest on surfaces
capable of supporting at least four times the load imposed on them by the scaffold operating at the rated
load of the hoist ( or at least 1.5 times the load imposed on them by the scaffold at the stall capacity of the
hoist, whichever is greater). The scaffold support devices are those such as outrigger beams, cornice
hooks, parapet clamps and similar devices. Suspension scaffold outrigger beams, when used, must be
made of structural metal or equivalent strength material and must be restrained to prevent movement.
The inboard ends of suspension scaffold outrigger beams must be stabilized by bolts or other direct con-nections
to the floor or roof deck, or they must have their inboard ends stabilized by counterweights.
However, masons’ multi- point adjustable suspension scaffold outrigger beams must not be stabilized by
counterweights. Tiebacks must be used to secure outrigger beams that are not stabilized by bolts or other
direct connections to the floor or roof deck. Tiebacks must be equivalent in strength to the suspension ropes.
Before the scaffold is used, a competent person must evaluate direct connections to confirm that the
supporting surfaces are capable of supporting the loads to be imposed. In addition, as related to masons
multi- point adjustable suspension scaffold, connections must be designed by an engineer experienced in
such scaffold design.
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Counterweights must be secured by mechanical means to the outrigger beams to prevent accidental
displacement; counterweights must not be removed from an outrigger beam until the scaffold is disas-sembled.
Support devices such as cornice hooks, roof hooks, roof irons, parapet clamps or similar devices must be
made of steel, wrought iron or materials of equivalent strength. They must be supported by bearing
blocks and secured against movement by tiebacks installed at right angles to the face of the building or
structure. Sound points of anchorage include structural members, but do not include standpipes, vents,
other piping systems or electrical conduit. Tiebacks must be equivalent in strength to the hoisting rope.
Suspension scaffold power- operated hoists and manual hoists must be tested and listed by a qualified
testing laboratory. Gasoline powered equipment and hoists must not be used on suspension scaffolds.
Gears and brakes of power- operated hoist used on suspension scaffolds must be enclosed.
In addition to the normal operating brake, suspension scaffold power- operated hoists and manually
operated hoists must have a braking device or locking pawl that engages when the hoist exceeds normal
descent speed ( makes either an instantaneous change in momentum or an accelerated over- speed).
Manually operated hoists require a positive crank force to descend. At least four wraps of suspension rope
must be maintained at the lowest point of scaffold travel when winding drum hoists are used. When other
types of hoists are used, the suspension ropes must be of sufficient length to allow the scaffold to be low-ered
without the rope end passing through the hoist, or the rope end must be designed to prevent the end
from passing through the hoist.
Suspension ropes supporting adjustable suspension scaffolds must be of a diameter large enough to
provide sufficient surface area for proper functioning of brake and hoist mechanisms. Wire suspension
rope may only be joined together by eye splice thimbles connected with shackles or coverplates and bolts.
Load ends of wire suspension ropes must be equipped with proper size thimbles and secured by eye- splic-ing
or equivalent means. Swaged attachments or spliced eyes on wire suspension rope must be made by a
wire rope manufacturer or qualified person. Wire rope clips must be retightened after initial loading and
inspected and retightened regularly. Repair of a defective or damaged wire rope is prohibited.
Single- point Adjustable ( Boatswain’s Chairs)
A single- point adjustable suspension scaffold is a suspension scaffold consisting of a platform suspend-ed
by one rope from an overhead support and equipped with means to permit the movement of the plat-form
to desired work levels ( see figure 14).
The supporting rope for the scaffold must remain vertical from the scaffold and suspension device.
Tackle for a boatswain’s chair must have the correct size ballbearing or bushed blocks and properly eye-spliced
first grade manila rope of at least 5⁄ 8". Seat slings must be reeved through four corner holes in the
seat, crossed on the underside of the seat and rigged to prevent slippage. Seat slings must be of at least
5⁄ 8" fiber or synthetic rope or its equivalent, except when employees are using a heat producing process
( e. g., gas or arc welding), then wire rope of at least 3⁄ 8" must be used. Boatswain’s chairs that are not cross-laminated
wood must be reinforced on the underside by cleats to prevent splitting.
When two single- point suspension scaffolds are joined to create a two- point suspension scaffold, the
scaffold must meet the requirements of a two- point scaffold. Powered single- point adjustable scaffolds
will require the use of a minimum 5⁄ 16" diameter wire rope and hoists rated by a nationally recognized lab-oratory.
Two- point Adjustable ( Swing Stage)
A two- point suspension scaffold ( swing stage) is a suspension scaffold consisting of a platform support-ed
by hangers ( stirrups) suspended by two ropes from overhead supports and equipped with means to
permit the raising and lowering of the platform to desired work levels ( see figure 9).
Platforms may not be more than three feet wide unless designed by a qualified person to prevent
unstable conditions. Platforms can be ladder- type, plank- type, beam- type, light metal- type or modular-truss
type. The light metal- type should be tested and listed by a nationally recognized laboratory.
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Platforms must be secured to hangers ( stirrups) by U- bolts or equivalent means. The blocks for fiber
and synthetic ropes must consist of a minimum of one double and one single block. The sheaves must fit
the size of rope. The scaffolds must be tied or secured by other means to prevent swaying.
Scaffolds specially designed as two- point scaffolds may not be connected together during raising and
lowering operations. Two- point scaffolds designed for use in multiple- point scaffolds can be bridged
together if the connections are articulated and the hoist is seized properly. Passage between one platform
to another is permissible only when the platforms are at the same height, closely abutted, and walk-through
stirrups specially designed for this purpose are used.
Multiple- point Adjustable
A multiple- point adjustable suspension scaffold is a suspension scaffold consisting of a platform( s) sus-pended
by more than two ropes from overhead supports and equipped with means to permit the raising
and lowering of the platform to desired work levels ( see figure 10).
A stone setter’s multiple- point adjustable suspension scaffold is a two- point or multiple- point adjustable
suspension scaffold designed and used for stone setting operations. A mason’s adjustable suspension scaffold
is a two- point or multiple- point adjustable suspension scaffold designed and used for masonry operations.
Two or more scaffolds may not be bridged together unless specially designed to be bridged, the bridge
connections are articulated, and the hoists are seized properly. If bridges are not used, passage may be
made from one platform if the platforms are at the same height and closely abutted. Scaffolds must be
suspended from metal outriggers, iron brackets, wire rope slings, iron hooks or equal means. Scaffold con-nections
for mason’s adjustable suspension scaffolds must be designed by an engineer experienced in scaf-fold
design.
Multi- level
A multi- level suspended scaffold is a two- point or multiple- point adjustable suspension scaffold with a
series of platforms at various levels supported by common stirrups ( see figure 11). Such scaffolds must have
added independent support lines equal to the number of points supported and equal in strength to the sus-pension
lines. Independent support lines and suspension ropes may not be attached to the same anchorage
points. Platform supports must be attached to the support stirrup and not to any other platform.
Catenary
A catenary scaffold is a suspension scaffold consisting of a platform fastened to two essentially hori-zontal
and parallel ropes, which are secured to structural members. Horizontal ropes are usually sup-ported
by intermediate vertical pickup ropes to reduce sag and anchorage load ( see figure 20). Only one
platform may be placed between consecutive vertical pickups and no more than two platforms maybe
used.
Wire rope supported platforms must have hook- shaped stops on each end. Hooks must be situated to
prevent the platform from falling in the event that one wire rope breaks. Supporting ropes should be
equal to 1⁄ 2" improved plow steel wire rope. Care must be taken to prevent overtightening of wire ropes,
which can cause excessive force at anchorages and overstressing by the scaffold load. Wire ropes must be
continuous without splices between anchors.
Float ( Ship)
A float ( ship) scaffold is a suspension scaffold consisting of a braced platform resting upon two parallel
bearers and hung from overhead supports by ropes of fixed length ( see figure 23).
The platform must be supported by at least two bearers, each projecting a minimum of six inches
beyond the platform. Support ropes must be equal in strength to at least 1" first grade manila rope.
Rope connections must be made to ensure that the platform will not shift or slip. If only two ropes are
used for each float, they must be arranged to supply four ends, which are securely attached to overhead
supports. Each supporting rope must be hitched around one end of the bearer and pass under the plat-form
to the other end of the bearer where it is hitched again, leaving sufficient rope at each end for the
supporting ties.
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Interior Hung
An interior hung scaffold is a suspension scaffold consisting of a platform suspended from the ceiling or
roof structure by fixed length supports ( see figure 19).
Such scaffolds are to be suspended only from the roof structure or other structural members ( e. g., ceiling
beams). Overhead supporting members require inspection for strength before scaffold erection. Suspension
ropes and cable must be connected to the supporting members by shackles, clips, thimbles or equal means.
Needle Beam
A needle beam scaffold is a suspension scaffold consisting of a platform supported by needle beams ( see
figure 18).
Scaffold support beams must be installed on the edges ( narrow side). Ropes and hangers must be used
for support, with the exception that one end of the scaffold can be supported by a solid, permanent struc-tural
member. Support ropes must be equal in strength to at least 1" first grade manila rope. Ropes must
be securely attached to needle beams. The support connection must be arranged to prevent the needle
beam from rolling or being displaced. Platforms must be securely attached to needle beams by bolts or
equal means.
Special Use Scaffolds
Scaffolds and assembly must be capable of supporting their own weight and at least four times the
maximum intended load applied or transmitted to the scaffold and components.
Form and Carpenter Bracket
A form scaffold is a supported scaffold consisting of a platform supported by brackets attached to a
formwork. A carpenter’s bracket scaffold is a supported scaffold consisting of a platform supported by
brackets attached to building or structural walls.
Each bracket must be attached to the supporting formwork or structure by means of nails, a metal stud
attachment device, welding or hooking each bracket over a secured structural supporting member with
the form walers bolted to the form or fastened by snap ties or tie bolts extending through the form and
securely anchored. On carpenter’s bracket scaffolds, the tie bolts can extend through the opposite side of
the structure’s wall ( see figure 15). Wooden bracket form scaffolds must be an integral part of the form
panel. Folding metal brackets must be bolted or secured with a locking pin.
Roof Bracket
A roof bracket scaffold is a rooftop supported scaffold consisting of a platform supported by triangular
shaped supports.
Brackets must conform to the pitch of the roof and produce a level support for the platform. Brackets
should be secured in place by nails. When nails are not practical, brackets should be anchored by 3⁄ 4" first
grade manila rope or its equivalent.
Outrigger
An outrigger scaffold is a supported scaffold consisting of a platform supported by outrigger beams
( thrustouts) projecting beyond the wall or face of a building or structure with the inboard ends secured
inside the building or structure ( see figure 7).
An outrigger scaffold and components must be constructed and loaded according to specific configura-tions
of the required standards or designed by a registered professional engineer and built and loaded
according to the design.
The length of the outrigger beams may not be less than 11⁄ 2 times the length of the outboard end mea-sured
from the fulcrum point to the extreme point of anchorage. The beams must rest on the edge ( narrow
side) with the sides plumb and the edges horizontal. The fulcrum point is to rest on secure six- inch bear-ings.
Beams must be secured to prevent movement and braced at the fulcrum point to prevent tipping.
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Inboard ends must be securely anchored by braced struts bearing against sills contacting overhead
beams or the ceiling, or tension members secured to the floor joists underfoot, or both, as necessary. The
supporting structure must be braced to eliminate any horizontal movement. Platform units must be
nailed, bolted or otherwise firmly affixed to outriggers. The front end of the platform must be positioned
no more than three inches from the structure.
Pump Jack
A pump jack scaffold is a supported scaffold consisting of a platform supported by vertical poles and
movable support brackets ( see figure 24).
Brackets, braces and accessories for pump jack scaffolds must be fabricated from metal plates and
angles. Two positive gripping devices are required for each bracket. Poles must be secured to structures
by rigid triangular bracing or its equivalent at the bottom, top, and other points.
When it is necessary to raise the platform, crossbracing must be added about four feet on the side oppo-site
the pump jack brace and be left in place until the pump jack has been moved and the initial brace
has been reinstalled. If wood poles are used, the lumber must be straight- grained, free of shakes and
large loose or dead knots and other imperfections that may reduce the strength of the wood. If two consec-utive
lengths are used to form the wood poles, the poles are to be connected together with the seam paral-lel
to the bracket. If 2" x 4" lumber is used to create a pole, the splices must be strong enough to maintain
the full strength of the member. Workbenches may not be used as scaffold platforms.
Ladder Jack
A ladder jack scaffold is a supported scaffold consisting of a platform supported by brackets attached to
ladders ( see figure 21).
The maximum allowable height for a ladder jack scaffold is 20 feet. Only manufactured ladders may be
used. Ladders must meet required standards. Ladders supporting ladder jacks must be situated, fastened
or contain devices to prevent slipping. The ladder jack must be designed and used so that it bears only on
the side rails or only on the ladder rungs. If on the rungs, the contact on each rung must be a minimum of
10 inches. Platforms must be at least 12 inches wide and may not be bridged one to another.
Window Jack
A window jack scaffold is a supported scaffold consisting of a platform supported by a bracket or jack
that projects through a window opening ( see figure 22).
Window jack scaffolds must be securely attached to window openings. Use should be restricted to the
work only at the window opening. Jacks may not be used to support other types of scaffolding and planks
or platforms placed between one window jack and another window jack.
Horse
A horse scaffold means a supported scaffold consisting of a platform supported by construction horses
( see figure 17).
Horse scaffolds must be built to a height of no more 10 feet or two tiers, whichever is less. When tiers
are used, each horse must be placed immediately over the horse of the lower tier. The legs of each horse
must be nailed to prevent dislocation. Each tier must be crossbraced.
Crawling Boards
A crawling board ( chicken ladder) is a supported scaffold consisting of a plank with cleats spaced and
secured to provide footing for use on sloped surfaces such as roofs.
During roof construction or repair or maintenance, crawling boards must extend from the roof peak to
the eaves. Crawling boards must be secured to the roof by ridge hooks or equal means.
Step, Platform and Trestle Ladder
A step, platform and trestle ladder scaffold is a supported scaffold consisting of a platform supported
directly on the rungs of step ladders or a building wall.
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Platforms may not be placed higher than the second highest rung or step of the supporting ladder.
Ladders must be located, secured or contain devices to avert slipping. Scaffolds may not be bridged one to
another.
Aerial Lifts
General requirements: Aerial lifts include the following types of vehicle- mounted aerial devices used
to elevate personnel to job- sites above ground: extensible boom platforms, aerial ladders, articulating
boom platforms, vertical towers and a combination of any of this equipment. Aerial equipment may be
made of metal, wood, fiberglass reinforced plastic ( FRP) or other material. It may be powered or manually
operated. Such equipment and/ or devices are deemed to be aerial lifts whether or not they are capable of
rotating about a substantially vertical axis. Aerial lifts acquired for use on or after Jan. 22, 1973, must be
designed and constructed in conformance with the applicable requirements of American National
Standards for “ Vehicle Mounted Elevating and Rotating Work Platforms,” ANSI A92.2- 1969, including
appendix.
Aerial lifts may be “ field modified” for uses other than those intended by the manufacturer provided
the modification has been certified in writing by the manufacturer or by any other equivalent entity ( such
as a nationally recognized testing laboratory). The modification( s) to aerial lifts should be done in manner
to be in conformity with all applicable provisions of ANSI A92.2- 1969 and appropriate section of OSHA
standards ( i. e., 1926.453) to be at least as safe as the equipment was before modification.
Specific requirements:
Ladder trucks and tower trucks. Aerial ladders must be secured in the lower traveling position by
the locking device on top of the truck cab/ and the manually operated device at the base of the ladder
before the truck is removed for the highway travel.
Extensible and articulating boom platforms. Lift controls must be tested each day prior to use to
determine that such controls are in safe working condition. Only authorized individuals can operate an
aerial lift. Belting off to an adjacent pole, structure or equipment while working from an aerial lift is not
permitted. Employees are required to always stand firmly on the floor of the basket. The employee must
not sit or climb on the edge of the basket or use planks, ladders or other devices for a work position. A
body belt must be worn and a lanyard attached to the boom or basket when working from an aerial lift.
( Note: Body belt( s) can serve as a positioning device; body belts are not acceptable as part of a personal
fall arrest system.)
Boom and basket load limits specified by the manufacturer must not be exceeded. The brakes must be
set and when outriggers are used, they must be positioned on pads or a solid surface. Wheel chocks must
be installed before using an aerial lift on an incline, provided they can be safely installed. An aerial lift
truck must not be moved when the boom is elevated in a working position with men in the basket, except
for equipment that is specifically designed for this type of operation.
Articulating boom and extensible boom platforms, primarily designed as personnel carriers, must have
both platform ( upper) and lower controls. Upper controls must be in or beside the platform within easy
reach of the operator. Lower controls must provide for overriding the upper controls. Controls must be
plainly marked as to their function. Lower level controls must not be operated unless permission has
been obtained from the employee in the lift, except in case of emergency. Climbers cannot be worn while
performing work from an aerial lift. The insulated portion of an aerial lift must not be altered in any
manner that might reduce its insulating value. Before moving an aerial lift for travel, the boom( s) must
be inspected to see that it is properly cradled and outriggers are in stowed position ( except as permitted
otherwise by this section of the safety standard).
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Glossary
Aerial Device. Any vehicle mounted, telescoping or articulating, or both, used to position personnel
( workers).
Aerial Ladder. An aerial device consisting of a single- or multiple- section extensible ladder.
Articulating Boom Platform. An aerial device with two or more hinged boom sections.
Bearer. A horizontal transverse scaffold member ( which may be supported by ledgers or runners) upon
which the scaffold platform rests and joins scaffold uprights, posts, poles and similar members.
Brace. A tie that holds one scaffold member in a fixed position with respect to another member. Brace
also means a rigid type of connection holding a scaffold to a building or structure.
Cleat. A structural member used at the ends of platform units to prevent the units from slipping off
their supports. Cleats are also used to provide footing on sloped surfaces such as crawling boards.
Coupler. A device for locking together the component tubes of a tube and coupler scaffold.
Equivalent. An alternative design, material or method that the employer can demonstrate will provide an
equal or greater degree of safety for employees than the method or item specified in the standard.
Extensible Boom Platform. An aerial device ( except ladders) with a telescopic or extensible boom.
Telescopic derricks with personnel platform attachments are considered to be extensible boom platforms
when used with a personnel platform.
Harness. A design of straps that is secured about the employee in a manner to distribute the arresting
forces over at least the thighs, shoulders and pelvis, with provisions for attaching a lanyard, lifeline or
deceleration device.
Hoist. A mechanical device to raise or lower a suspended scaffold. It can be mechanically powered or
manually operated.
Insulated Aerial Device. An aerial device designed for work on energized lines and apparatus.
Ladder Stand. A mobile, fixed- size, self- supporting ladder that appears as a wide flat tread ladder in
the form of stairs.
Ledger. A horizontal scaffold member upon which bearers rest. It is the longitudinal member that joins
scaffold uprights, posts, poles and similar members.
Maximum Intended Load. The total load of all employees, equipment, tools, materials, transmitted
loads, wind loads, and other loads reasonably anticipated to be applied to a scaffold or scaffold component
at any one time.
Mechanically Powered Hoist. A hoist that is powered by other than human energy.
Outrigger. The structural member of a supported scaffold used to increase the base width of a scaffold
in order to provide greater stability for the scaffold.
Outrigger Beam. The structural member of a suspension scaffold or outrigger scaffold that provides
support for the scaffold by extending the scaffold point of attachment to a point out and away from the
structure or building.
Personal Fall Arrest System. A system used to arrest an employee in a fall from a working level. It con-sists
of an anchorage, connectors, a body belt or body harness and may include a lanyard, deceleration
device, lifeline or suitable combinations of these. The use of a body belt for fall arrest is prohibited.
Platform. The horizontal working surface of a scaffold.
Platform. Any personnel- carrying device ( basket or bucket) that is a component of an aerial device.
Platform Unit. The individual wood planks, fabricated planks, fabricated decks and fabricated platforms
that compose the platforms and walkways of a scaffold.
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Positioning Device System. A body belt or body harness system rigged to allow an employee to be sup-ported
on an elevated vertical surface, such as a wall, and work with both hands free while leaning.
Runner. The lengthwise horizontal bracing or bearing member that supports bearers on tube and cou-pler
scaffolds.
Scaffold. Any temporary elevated or suspended platform and its supporting structure used for supporting
employees or materials or both, except this term does not include crane or derrick suspended personnel plat-forms.
Scissor Lift. A self- propelled or manually propelled lifting personnel platform ( within wheel base) capa-ble
of vertical movement with onboard controls as defined by ANSI/ SIA A92.6- 1990.
Vertical Pickup. A rope used to support the horizontal rope in catenary scaffolds.
Walkway. A portion of a scaffold platform used only for access and is not a work level.
Work Level. An elevated platform used for supporting employees and their materials where work activi-ties
are performed.
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References
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“ Fall Protection.” July 1990. Construction Safety. Construction Safety Association of Ontario.
Hinson, J. R. October 1988. “ Careful Selection, Use of Scaffolds Imperative to Accident Prevention.” Occupational
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International Labor Organization. 1983. “ Scaffolding.” Encyclopedia of Occupational Health & Safety, vol. II, L– Z,
International Labor Organization.
Kliwinski, D. P. October 1988. “ Elevated Workplaces: Ladders and Scaffolds.” Center for Excellence in
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McElroy. Chicago: NSC.
N. C. Department of Labor. 1999. North Carolina Occupational Safety and Health Standards for General Industry.
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Platforms. N. C. Department of Labor, Occupational Safety and Health Division. Raleigh.
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Potts, D. L. 1985. “ An Assessment of Carpenter’s Injury Risks Needing Research.” NIOSH Report: DSR- 85- 0458
O. M. National Constructors Association.
Potts, D. L. Spring 1991. “ Fall Prevention and Protection.” Excel, vol. 4, no. 3. West Virginia University, Center for
Excellence in Construction Safety. Morgantown, WV.
U. S. Department of Labor, OSHA 3150, 2000 ( Reprinted); A Guide to Scaffold Use in the Construction Industry.
U. S. Department of Labor. May 1983. “ Survey of Scaffold Accidents Resulting in Injuries, 1978.” U. S. Department
of Labor, Bureau of Labor Statistics.
32
The following industry guides are available from the N. C. Department of Labor’s Occupational Safety and
Health Division:
1# 1. A Guide to Safety in Confined Spaces
1# 2. A Guide to Procedures of the N. C. Safety and Health Review Commission ( downloadable PDF ONLY)
1# 3. A Guide to Machine Safeguarding
1# 4. A Guide to OSHA in North Carolina
1# 5. A Guide for Persons Employed in Cotton Dust Environments ( downloadable PDF ONLY)
1# 6. A Guide to Lead Exposure in the Construction Industry ( downloadable PDF ONLY)
1# 7. A Guide to Bloodborne Pathogens in the Workplace
1# 8. A Guide to Voluntary Training and Training Requirements in OSHA Standards
1# 9. A Guide to Ergonomics
# 10. A Guide to Farm Safety and Health ( downloadable PDF ONLY)
# 11. A Guide to Radio Frequency Hazards With Electric Detonators ( downloadable PDF ONLY)
# 12. A Guide to Forklift Operator Training
# 13. A Guide to the Safe Storage of Explosive Materials ( downloadable PDF ONLY)
# 14. A Guide to the OSHA Excavations Standard
# 15. A Guide to Developing and Maintaining an Effective Hearing Conservation Program
# 16. A Guide to Construction Jobsite Safety and Health/ Guía de Seguridad y Salud para el Trabajo de Construcción
# 17. A Guide to Asbestos for Industry
# 18. A Guide to Electrical Safety
# 19. A Guide to Occupational Exposure to Wood, Wood Dust and Combustible Dust Hazards ( downloadable PDF ONLY)
# 20. A Guide to Crane Safety
# 23. A Guide to Working With Electricity
# 25. A Guide to Personal Protective Equipment
# 26. A Guide to Manual Materials Handling and Back Safety
# 27. A Guide to the Control of Hazardous Energy ( Lockout/ Tagout)
# 28. A Guide to Eye Wash and Safety Shower Facilities
# 29. A Guide to Safety and Health in Feed and Grain Mills ( downloadable PDF ONLY)
# 30. A Guide to Working With Corrosive Substances ( downloadable PDF ONLY)
# 31. A Guide to Formaldehyde ( downloadable PDF ONLY)
# 32. A Guide to Fall Prevention in Industry
# 32s. Guía de Protección Contra Caídas en la Industria ( Spanish version of # 32)
# 33. A Guide to Office Safety and Health ( downloadable PDF ONLY)
# 34. A Guide to Safety and Health in the Poultry Industry ( downloadable PDF ONLY)
# 35. A Guide to Preventing Heat Stress
# 38. A Guide to Safe Scaffolding
# 40. A Guide to Emergency Action Planning
# 41. A Guide to OSHA for Small Businesses in North Carolina
# 41s. Guía OSHA para Pequeños Negocios en Carolina del Norte ( Spanish version of # 41)
# 42. A Guide to Transportation Safety
# 43. A Guide to Combustible Dusts
Occupational Safety and Health ( OSH)
Sources of Information
You may call 1- 800- NC- LABOR ( 1- 800- 625- 2267) to reach any division of the N. C. Department of Labor; or visit the
NCDOL home page on the World Wide Web: http:// www. nclabor. com.
N. C. Occupational Safety and Health Division
Mailing Address: Physical Location:
1101 Mail Service Center 111 Hillsborough St.
Raleigh, NC 27699- 1101 ( Old Revenue Building, 3rd Floor)
Local Telephone: ( 919) 807- 2900 Fax: ( 919) 807- 2856
For information concerning education, training and interpretations of occupational safety and health standards contact:
Education, Training and Technical Assistance Bureau
Mailing Address: Physical Location:
1101 Mail Service Center 111 Hillsborough St.
Raleigh, NC 27699- 1101 ( Old Revenue Building, 4th Floor)
Telephone: ( 919) 807- 2875 Fax: ( 919) 807- 2876
For information concerning occupational safety and health consultative services and safety awards programs contact:
Consultative Services Bureau
Mailing Address: Physical Location:
1101 Mail Service Center 111 Hillsborough St.
Raleigh, NC 27699- 1101 ( Old Revenue Building, 3rd Floor)
Telephone: ( 919) 807- 2899 Fax: ( 919) 807- 2902
For information concerning migrant housing inspections and other related activities contact:
Agricultural Safety and Health Bureau
Mailing Address: Physical Location:
1101 Mail Service Center 111 Hillsborough St.
Raleigh, NC 27699- 1101 ( Old Revenue Building, 2nd Floor)
Telephone: ( 919) 807- 2923 Fax: ( 919) 807- 2924
For information concerning occupational safety and health compliance contact:
Safety and Health Compliance District Offices
Raleigh District Office ( 313 Chapanoke Road, Raleigh, NC 27603)
Telephone: ( 919) 779- 8570 Fax: ( 919) 662- 4709
Asheville District Office ( 204 Charlotte Highway, Suite B, Asheville, NC 28803- 8681)
Telephone: ( 828) 299- 8232 Fax: ( 828) 299- 8266
Charlotte District Office ( 901 Blairhill Road, Suite 200, Charlotte, NC 28217- 1578)
Telephone: ( 704) 665- 4341 Fax: ( 704) 665- 4342
Winston- Salem District Office ( 4964 University Parkway, Suite 202, Winston- Salem, NC 27106- 2800)
Telephone: ( 336) 776- 4420 Fax: ( 336) 776- 4422
Wilmington District Office ( 1200 N. 23rd St., Suite 205, Wilmington, NC 28405- 1824)
Telephone: ( 910) 251- 2678 Fax: ( 910) 251- 2654
*** To make an OSHA Complaint, OSH Complaint Desk: ( 919) 807- 2796***
For statistical information concerning program activities contact:
Planning, Statistics and Information Management Bureau
Mailing Address: Physical Location:
1101 Mail Service Center 111 Hillsborough St.
Raleigh, NC 27699- 1101 ( Old Revenue Building, 2nd Floor)
Telephone: ( 919) 807- 2950 Fax: ( 919) 807- 2951
For information about books, periodicals, vertical files, videos, films, audio/ slide sets and computer databases contact:
N. C. Department of Labor Library
Mailing Address: Physical Location:
1101 Mail Service Center 111 Hillsborough St.
Raleigh, NC 27699- 1101 ( Old Revenue Building, 5th Floor)
Telephone: ( 919) 807- 2848 Fax: ( 919) 807- 2849
N. C. Department of Labor ( Other than OSH)
1101 Mail Service Center
Raleigh, NC 27699- 1101
Telephone: ( 919) 733- 7166 Fax: ( 919) 733- 6197

Click tabs to swap between content that is broken into logical sections.

A Guide to
Safe Scaffolding
N. C. Department of Labor
Occupational Safety and Health Division
1101 Mail Service Center
Raleigh, NC 27699- 1101
Cherie Berry
Commissioner of Labor
38
N. C. Department of Labor
Occupational Safety and Health Program
Cherie Berry
Commissioner of Labor
OSHA State Plan Designee
Allen McNeely
Deputy Commissioner for Safety and Health
Kevin Beauregard
Assistant Deputy Commissioner for Safety and Health
Bobby R. Davis
Reviewer
Acknowledgments
A Guide to Safe Scaffolding was initially prepared for the N. C. Department of Labor by David L. Potts. Mr. Potts has
written extensively about subjects regarding construction safety and is a recognized authority in safe scaffolding. The
information in this guide was updated in 2001.
_____
The N. C. Department of Labor is grateful to the Scaffolding Industry Association for permission to use the illustrations
in this guide.
_____
This guide is intended to be consistent with all existing OSHA standards; therefore, if an area is considered by the
reader to be inconsistent with a standard, then the OSHA standard should be followed.
To obtain additional copies of this guide, or if you have questions about North Carolina occupational safety and health stan-dards
or rules, please contact:
N. C. Department of Labor
Education, Training and Technical Assistance Bureau
1101 Mail Service Center
Raleigh, NC 27699- 1101
Phone: ( 919) 807- 2875 or 1- 800- NC- LABOR ( 1- 800- 625- 2267)
____________________
Additional sources of information are listed on the inside back cover of this guide.
____________________
The projected cost of the NCDOL OSH program for federal fiscal year 2008– 2009 is $ 17,042,662. Federal funding provides approximately 30 percent ($ 4,090,400) of
this total.
Reviewed 8/ 08
Contents
Part Page
Foreword . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1iiv
1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ivi1
2 Policy for Safe Scaffold Erection and Use . . . . . . . . . . . . . . . . . . ii12
3 Illustrations of Selected Types of Scaffolds . . . . . . . . . . . . . . . . . ii16
4 Types of Scaffolding and Information . . . . . . . . . . . . . . . . . . . . ii22
Glossary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ii30
References . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ii32
iii
Foreword
Scaffolding can provide an efficient and safe means to perform work. However, unsafe scaffolding procedures can lead
to accidents, serious injuries and death. This guide makes clear that planning ahead for the erection, use and dismantling
of scaffolding can substantially reduce scaffold- related accidents and injuries. Compliance with the manufacturer’s
instructions, the use of this guide and compliance with all scaffolding standards will help ensure a safer workplace for
employees.
Safety and health in the workplace is everyone’s responsibility. Employers must be aware of workplace hazards facing
their workers, and they must take appropriate action to minimize or eliminate exposure to these hazards. Workers are
responsible for following the policies, procedures and training requirements established by their employers. A Guide to
Safe Scaffolding discusses precautions that can prevent serious accidents and protect workers against fall injuries and
fatalities.
N. C. Department of Labor inspectors enforce the federal Occupational Safety and Health Act through a state plan
approved by the U. S. Department of Labor. The N. C. Department of Labor’s Occupational Safety and Health Division
offers many educational programs to the public and produces publications, including this guide, to help inform people
about their rights and responsibilities regarding occupational safety and health.
OSHA puts great emphasis on efforts to help citizens find ways to create safe and healthy workplaces. Everyone prof-its
from working together for safety. Reading and understanding A Guide to Safe Scaffolding will help you form sound
occupational safety and health practices where you work.
Cherie Berry
Commissioner of Labor
v
1
Introduction
Scaffolding has a variety of applications. It is used in construction, alteration, routine maintenance and
renovation. Scaffolding offers a safer and more comfortable work arrangement compared to leaning over
edges, stretching overhead and working from ladders. Suitable and sufficient scaffolding must be sup-plied
for work at elevations that cannot be accomplished safely by other means. Properly erected and
maintained, scaffolding provides workers safe access to work locations, level and stable working plat-forms,
and temporary storage for tools and materials for performing immediate tasks.
Accidents involving scaffolding mainly involve people falling, incorrect operating procedures, environ-mental
conditions and falling materials caused by equipment failure. The causes of scaffolding accidents
include failures at attachment points, parts failure, inadequate fall protection, improper construction or
work rules, and changing environmental conditions ( high winds, temperature extremes or the presence of
toxic gases). Additionally, overloading of scaffolding is a frequent cause of major scaffold failure.
Individuals exposed to scaffolding hazards include scaffold erectors and dismantlers, personnel work-ing
on scaffolds, and employees and the general public near scaffolding. Scaffold erectors and dismantlers
are at particular risk, since they work on scaffolds before ladders, guardrails, platforms and planks are
completely installed.
This guide IS NOT INTENDED to be a guideline for compliance with all pertinent regulations enforced
under the Occupational Safety and Health Act of North Carolina, but rather an overview of safe practices
in scaffolding procedures. Though the guide is not intended to be inconsistent with adopted standards, if
an area is considered by the reader to be inconsistent, the applicable standard should be followed.
1
2
Policy for Safe Scaffold Erection and Use
Safe scaffold erection and use should begin by developing policy and work rules. Policy and work rules
should concentrate on:
• sound design
• selecting the right scaffold for the job
• assigning personnel
• training
• fall protection
• guidelines for proper erection
• guidelines for use
• guidelines for alteration and dismantling
• inspections
• maintenance and storage
Sources of information for policy development and work rules include OSHA and ANSI standards, scaf-fold
trade associations, scaffolding suppliers, and safety and engineering consultation services.
Sound Design
The scaffold should be capable of supporting its own weight and at least four times the maximum
intended load to be applied or transmitted to the scaffold and components. Suspension ropes should be
capable of supporting six times the maximum intended load. Guardrails should be able to withstand at
least 200 pounds of force on the top rail and 100 pounds on the midrail. On complex systems, the services
of an engineer may be needed to determine the loads at particular points.
Selecting the Right Scaffold for the Job
You cannot contract away the responsibility for selecting the right scaffold for your job. But if you do
contract for scaffolding:
• Choose a scaffold supplier, rental agency and/ or erector who is thoroughly knowledgeable about the
equipment needed and its safe use.
• Obtain the owner’s manual prepared by the scaffolding manufacturer, which states equipment limi-tations,
special warnings, intended use and maintenance requirements.
If you are to select your own scaffold, begin by reviewing the written requirements ( blueprints, work
orders, etc.) to determine where scaffolds should be used and the type of scaffolding needed. Make sure
that the scaffolds meet all government and voluntary requirements. Consider that scaffolds are generally
rated light, medium and heavy duty. Light duty scaffolds can support a limited number of employees and
hand tools. Medium duty scaffolds must be capable of safely holding workers, hand tools and the weight
of construction materials being installed. Heavy duty scaffolds are needed when the scaffold must sustain
workers, tools and the weight of stored materials.
Account for any special features of the building structure in relationship to the scaffold, including dis-tinctive
site conditions. Factor these considerations into your policy:
• experience of erection and working personnel
• length and kind of work tasks to be performed
2
• weight of loads to be supported
• hazards to people working on and near the scaffolding
• needed fall protection
• material hoists
• rescue equipment ( particularly for suspended scaffolds)
• weather and environmental conditions
• availability of scaffolding, components, etc.
Assigning Personnel
Assign a competent person to oversee the scaffold selection, erection, use, movement, alteration, dis-mantling,
maintenance and inspection. Only assign trained and experienced personnel to work on scaf-folding.
Be certain they are knowledgeable about the type of scaffolding to be used and about the proper
selection, care and use of fall protection equipment ( perimeter protection, fall protection/ work positioning
belts and full harnesses, lanyards, lifelines, rope grabs, shock absorbers, etc.).
Training
Employees should receive instruction on the particular types of scaffolds that they are to use.
Training should focus on proper erection, handling, use, inspection, removal and care of the scaffolds.
Training must also include the installation of fall protection, particularly guardrails, and the proper
selection, use and care of fall arrest equipment.
The competent person( s) should receive additional training regarding the selection of scaffolds, recogni-tion
of site conditions, scaffold hazard recognition, protection of exposed personnel and the public, repair
and replacement options, and requirements of standards.
Site management personnel should also be familiar with correct scaffolding procedures so they can bet-ter
determine needs and identify deficiencies.
Fall Protection
Guardrails must be installed on all scaffold platforms in accordance with required standards and at
least consist of top rails, midrails and toeboards ( if more than 10 feet above the ground or floor). The top
edge height of toprails or equivalent member on supported scaffolds manufactured or placed in service
after Jan. 1, 2000, shall be installed between 38" and 45" above the platform surface. The top edge height
on supported scaffolds manufactured and placed in service before Jan. 1, 2000, and on all suspended scaf-folds
where both a guardrail and a personal fall arrest system are required shall be between 36" and 45".
When it is necessary to remove guardrails ( for example, to off- load materials), supervision must ensure
that they are replaced quickly.
Hard hats should be worn to protect against falling objects. Mesh, screens, intermediate vertical mem-bers
or solid panels should be used to safeguard employees and the public at lower levels. Ground- level
safety can be further provided by erecting canopies; by prohibiting entry into the fall hazard area by poli-cy,
barricades and signs; and by the proper placement of materials, tools and equipment on scaffolding.
Workers on suspended scaffolds must use a fall arrest system as protection against the failure of the
scaffold or its components. This system will usually consist of a full body harness, lanyard, rope grab,
independent vertical lifeline and an independent lifeline anchorage.
The full body harness is a belt system designed to distribute the impact energy of a fall over the shoul-ders,
thighs and buttocks. A properly designed harness will permit prolonged worker suspension after a
fall without restricting blood flow, which may cause internal injuries. Rescue is also aided because of the
upright positioning of the worker.
3
A lanyard connects the safety harness to the rope grab on the lifeline. Materials should be made of 5⁄ 8"
nylon rope or nylon webbing. Lanyards shall be kept as short as possible to limit fall distance or rigged
such that an employee can never free fall more than six feet.
Rope grabs contain a cam device that locks onto a lifeline when there is a hard tug or pull on the lan-yard.
Care must be taken to ensure that rope grabs are properly connected to lifelines so the cam will
work correctly. Rope grabs should be placed at the highest point on the lifeline to reduce the fall distance
and unintentional disengagement.
Independent vertical lifelines ( not scaffold suspension lines) of fiber rope should be used for each per-son
working on the suspended scaffold. In the presence of flame or heat, wire rope lifelines should be used
with lanyards containing shock absorbers. Vertical lifelines should extend from the anchorage point to
the ground or a safe landing place above the ground.
It is important to remember that fall protection is only as good as its anchorage. The anchorage points
are independent points on structures where lifelines are securely attached. These points must be able to
support at least 5,000 pounds per employee and preferably 5,400 pounds for a fall of up to six feet or
3,000 pounds for a fall of two feet or less.
General Guidelines for Proper Erection
Accidents and injuries can be reduced when the guidelines in this section are followed.
Supervise the erection of scaffolding. This must be done by a person competent by skill, experience and
training to ensure safe installation according to the manufacturer’s specifications and other requirements.
Know the voltage of energized power lines. Ensure increased awareness of location of energized power
lines; maintain safe clearance between scaffolds and power lines ( i. e., minimum distance of 3' for insulat-ed
lines less than 300 volts; 10' for insulated lines 300 volts or more). Identify heat sources like steam
pipes. Anticipate the presence of hazards before erecting scaffolds and keep a safe distance from them.
Be sure that fall protection equipment is available before beginning erection and use it as needed.
Have scaffolding material delivered as close to the erection site as possible to minimize the need for man-ual
handling. Arrange components in the order of erection.
Ensure the availability of material hoisting and rigging equipment to lift components to the erection
point and eliminate the need to climb with components. Examine all scaffold components prior to erec-tion.
Return and tag “ Do Not Use” or destroy defective components.
Prohibit or restrict the intermixing of manufactured scaffold components, unless: ( 1) the components fit
together properly, without force, ( 2) the use of dissimilar metals will not reduce strength, and ( 3) the
design load capacities are maintained.
All scaffold decks should be planked as fully as possible ( beginning at the work surface face) with gaps
between planks no more than 1" wide ( to account for plank warp and wane). ( Figure 1 shows types of
planking.) The remaining space on bearer member ( between the last plank and guardrail) cannot exceed
91⁄ 2" ( the space required to install an additional plank). Guardrail systems are not required on the build-ing
side when the platform is less than 16" from the building, except for suspended scaffolds where the
maximum distance is 12". In addition, scaffold setbacks will depend upon the needs of the trade. As an
example, masons require the scaffold platform to be as close to the wall as possible ( within 6"), while lath-ers
and plasterers using spraying apparatus must stand back ( and prefer a setback distance of at least
18"). Platform units must not extend less than 6" over their supports unless they are cleated or contain
hooks or other restraining devices. When platform units are abutted together or overlapped to make a
long platform, each end should rest on a separate support or equivalent support. Wood preservatives, fire
retardant finishes and slip- resistant finishes can be applied to platform units; however, no coating should
obscure the top and bottom of wooden surfaces. If fire retardants are used, an engineer should ensure
that the plank( s) will carry the required load since fire retardants can reduce the plank load capacity.
Provide suitable access to and between scaffolds ( see figure 4). Access can be provided by portable lad-ders;
hook- on ladders; attachable ladders; stairway- type ladders; integral prefabricated scaffold rungs;
4
direct passage from another scaffold, structure or personnel hoist; ramps; runways; or similar adequate
means. Crossbraces and scaffold frames shall not be used for access scaffold platforms unless they are
equipped with a built- in ladder specifically designed for such purpose. All ladders in use must meet
OSHA specifications, designed according to standards and secured against displacement. The bottom
steps of ladders must not be more than two feet from the supporting level. Rest platforms are recom-mended
for at least every 30– 36' of elevation. When direct access is used, spacing between scaffold and
another surface should be no more than 14" horizontally and 2 feet vertically.
Additional recommendations for the erection of supported scaffolds, suspension scaffolds, fabricated
frame scaffolds, outrigger scaffolds, etc., are also described in this booklet.
Guidelines for Use
• Be certain that scaffolds and components are not loaded beyond their rated and maximum capaci-ties.
• Prohibit the movement of scaffolds when employees are on them.
• Maintain a safe distance from energized power lines.
• Prohibit work on scaffolds until snow, ice and other materials that could cause slipping and falls are
removed.
• Protect suspension ropes from contact with sources of heat ( welding, cutting, etc.) and from acids
and other corrosive substances.
• Prohibit scaffold use during storms and high winds.
• Remove debris and unnecessary materials from scaffold platforms.
• Prohibit the use of ladders and other devices to increase working heights on platforms.
Guidelines for Alteration and Dismantling
• Require that scaffolds be altered, moved and dismantled under the supervision of a competent person.
• Alteration and dismantling activities should be planned and performed with the same care as with
erection.
• Tag any incomplete scaffold or damaged component out of service.
Inspections
Inspect all scaffolds and components upon receipt at the erection location. Return, tag “ Do Not Use” or
destroy defective components. Inspect scaffolds before use and attach a tag stating the time and date of
inspection.
Inspect scaffolds before each workshift and especially after changing weather conditions and pro-longed
interruptions of work. Check for such items as solid foundations, stable conditions, complete
working and rest platforms, suitable anchorage points, required guardrails, loose connections, tie- off
points, damaged components, proper access, and the use of fall protection equipment.
Maintenance and Storage
Maintain scaffolds in good repair. Only replacement components from the original manufacturer should
be used. Intermixing scaffold components from different manufacturers should be avoided. Fabricated scaf-folds
should be repaired according to the manufacturer’s specifications and guidance. Job- built scaffolds
should not be repaired without the supervision of a competent person.
Store all scaffolding parts in an organized manner in a dry and protected environment. Examine all
parts and clean, repair or dispose of them as necessary.
5
3
Illustrations of Selected Types of Scaffolds
Illustrations in this part offer the reader a general pictorial representation of selected types of scaffolds
which are addressed by standards enforced under the Occupational Safety and Health Act of North
Carolina ( OSHANC standards). The reader must not rely upon the illustrations to determine safety
requirements or safe use of the equipment for any particular installation situation. Rather, the reader
should refer to the appropriate OSHANC standard and related tables for specific information. The illus-trations
reference the OSHANC standards ( 29 CFR 1926 applies to the construction industry and 29 CFR
1910 applies to general industry).
Illustrations in this part were provided by the Scaffolding Industry Association. The illustrations are
not intended by the N. C. Department of Labor or the Scaffolding Industry Association to endorse any spe-cific
product, design or installation.
Figure 1
Scaffolding Work Surfaces [ 29 CFR 1926.451( a); 29 CFR 1910.28( a)]
6
LAMINATED
VENEER
LUMBER
( LVL)
SCAFFOLD PLANKS
SOLID
SAWN
LUMBER
FABRICATED
SCAFFOLD
DECK
FABRICATED
SCAFFOLD
PLANK
STAGE
PLATFORM
DECORATOR
PLANK
WOOD
SCAFFOLD
PLANK
MODULAR
STAGE
PLATFORM
METAL
SCAFFOLD
PLANK
Figure 2
Wood Pole Scaffold [ 29 CFR 1926.452( a); 29 CFR 1910.28( b)]
Figure 3
Tube and Coupler Scaffold [ 29 CFR 1926.452( b); 29 CFR 1910.28( c)]
7
POLE
PLANKED LEVELS
BEARER
GUARDRAIL SYSTEM
ACCESS LADDER
RUNNER
DIAGONAL BRACING
GUARDRAIL SYSTEM
WITH TOEBOARDS
PLANKING
RIGID
CLAMP
SWIVEL
CLAMP
RUNNER
BEARER
POST
TYPICAL
JOINT
CONNECTION
CROSS-BRACING
DIAGONAL BRACE
SILL
BASE PLATE
Figure 4
Fabricated Frame Scaffold ( Tubular Welded Frame Scaffold) [ 29 CFR 1926.452( c); 29 CFR 1910.28( d)]
and Scaffold Access ( Ladder or Equivalent) [ 29 CFR 1926.451( e); 29 CFR 1910.28( a)( 12)]
8
INTERNAL STAIR UNIT
GUARDRAIL
HANDRAIL SYSTEM
CROSSBRACE
STEP UNIT
FRAME or
PANEL
ACCESS
GATE
INTERMEDIATE
LEVEL
TOEBOARDS
FRAME
or
PANEL
ACCESS
LADDER
BRACKET
ATTACHMENT
COUPLER
EXTERNAL LADDERS
BUILT- IN ATTACHABLE
Figure 5
Manually Propelled Mobile Scaffold ( Fabricated Tubular Frame) [ 29 CFR 1926.452( w); 29 CFR 1910.29]
9
WORK
PLATFORM
GUARDRAIL SYSTEM
ACCESS
GATE
END
FRAME
LOCKING
PINS
CROSS-BRACING
TOEBOARD
COUPLER
ACCESS
LADDER
LOCKING
CASTERS
CASTER FASTENING PINS
HORIZONTAL
DIAGONAL
BRACE
Figure 6
Examples of Vehicle- Mounted Elevating and Rotating Aerial Devices ( covered by ANSI A92.2)
[ 29 CFR 1926.453]
10
VEHICLE- MOUNTED AERIAL PLATFORM WITH
TELESCOPING AND ROTATING BOOM
VEHICLE- MOUNTED AERIAL PLATFORM
( SCISSOR TYPE)
Figure 7
Outrigger Scaffold [ 29 CFR 1926.452( i); 29 CFR 1910.28( e)]
11
THIS END
RIGIDLY SECURED
OUTRIGGER BEAM BLOCKED
FOR LATERAL SUPPORT
Figure 8
Mason’s Adjustable Multiple- point Suspension Scaffold ( With Winding Drum Hoists)
[ 29 CFR 1926.452( q); 29 CFR 1910.28( f)]
12
ALTERNATE BOLT & SPECIAL
ANCHOR IMBEDDED IN CONCRETE
AT TIME OF POUR
ANCHORAGE SYSTEM
BUILDING
TYPICAL SUPPORT FOR STEEL
STRUCTURAL STEEL
OVERHEAD PROTECTION
GUARDRAIL
SYSTEM
WITH SCREEN
Figure 9
( Swinging Scaffold) Two- point Suspension [ 29 CFR 1926.452( p); 29 CFR 1910.28( g)]
13
COUNTERWEIGHTS
TIEBACK
COUNTERWEIGHTS
TIEBACK
TIEBACKS
OUTRIGGER
BEAM
ROLLING
OUTRIGGER BEAM
SECOND
WIRE ROPE
WOOD
BLOCKING
ROOF HOOK
SUSPENSION
WIRE ROPES
PARAPET CLAMP
SUSPENSION
WIRE ROPE
SUSPENSION
WIRE ROPE
SUSPENSION
WIRE ROPES
PLATFORM
PLATFORM
MODULAR PLATFORM
POWERED TRACTION HOIST
GUARDRAIL SYSTEM WITH SCREEN & TOEBOARDS
GUARDRAIL SYSTEM WITH TOEBOARDS
POWER WINDING DRUM HOIST
GUARDRAIL SYSTEM WITH
TOEBOARDS
MANUAL WINDING DRUM HOIST
Figure 10
Multiple- point Suspension Scaffold [ 29 CFR 1926.452( q)]
14
INDEPENDENT LINE
HOIST
LINE
GUARDRAIL
SYSTEM
STAGE
HOIST
Figure 11
Multi- level Suspension Scaffold With Powered Hoists [ 29 CFR 1926.452( v)]
15
SECOND WIRE ROPE
LANYARD ATTACHED TO TROLLY LINE
GUARDRAIL
SYSTEM
GUARDRAIL
SYSTEM
SUSPENSION
WIRE ROPE
HOISTING
MACHINE
PLATFORM
UNITS
Figure 12
Stone Setters’ Adjustable Multiple- point Suspension Scaffold
( With Manual Winding Drum Hoists) [ 29 CFR 1926.452( q); 29 CFR 1910.28( h)]
Figure 13
Single- point Adjustable Suspension Scaffolds ( Work Cages)
[ 29 CFR 1926.452( o); 29 CFR 1910.28( i)]
16
HOIST LINE
OUTSIDE WIRE ROPE
TOPRAIL
GUARDRAIL
BRACKETS
MIDRAIL
INSIDE WIRE
ROPE
OPERATING
HANDLE
GUIDE
CLAMP
ROLLER BUNTER
TOEBOARD
PLATFORM CORNER BRACE
BOLT
WIRE ROPE
GUIDE WHEEL
PUTLOG HINGE BOLT
PUTLOG
END GUARDRAIL
SYSTEM
TOPRAIL
MIDRAIL
INTERMEDIATE
GUARDRAIL
SUPPORT
GUARDRAIL
SUPPORT
TOEBOARD
END BRACKET
END GUARDRAIL
SYSTEM
PLATFORM SIDERAIL
POWER TRACTION HOIST
WORK CAGE
POWER TRACTION HOIST
WORK CAGE WITH EXTENSIONS
W
SINGLE POINT SUSPENSION
SCAFFOLD WINDING DRUM HOIST
Figure 14
Single- point Adjustable Suspension Scaffold Boatswain’s Chairs
[ 29 CFR 1926.452( o); 29 CFR 1910.28( j)]
Figure 15
Form Scaffold Carpenter’s Bracket Scaffold ( Metal)
[ 29 CFR 1926.452( g); 29 CFR 1910.28( k)]
17
BOATSWAIN CHAIR
POWERED
BOATSWAIN CHAIR
MANUAL
WALL STUD
GUARDRAIL
POST
LOCATION
THRU BOLT
Figure 18
Needle Beam Scaffold ( Structural Member Above) [ 29 CFR 1926.452( u); 29 CFR 1910.28( n)]
18
BEARERS
LEGS
CORNER
BRACES
LIGHT DUTY 8' MAX
MEDIUM DUTY 5' MAX
PLATFORM
NEEDLE BEAM
ROPES
Figure 16
Bricklayer’s Square Scaffold
[ 29 CFR 1926.452( e)]
Figure 17
Horse Scaffold
[ 29 CFR 1926.452( f); 29 CFR 1910.28( m)]
Figure 19
Interior Hung Scaffold [ 29 CFR 1926.452( t); 29 CFR 1910.28( p)]
Figure 20
Catenary Scaffold [ 29 CFR 1910.28( g); 29 CFR 1926.452( r)]
19
BUILDING
STRUCTURAL MEMBER
SUPPORTING ROPE
( ALTERNATE TUBE & COUPLER)
PLANK
BEARER
STRUCTURE ABOVE
PLATFORM
VERTICAL PICKUPS
ANCHORED
WIRE ROPE
ANCHORED
HOOK STOPS
20
Figure 21
Ladder Jack Scaffold [ 29 CFR 1926.452( k); 29 CFR 1910.28( q)]
Figure 22
Window Jack Scaffold [ 29 CFR 1926.452( l); 29 CFR 1910.28( r)]
OVERHANG
PLANK
HEAVY- DUTY
LADDER
LENGTH OF FABRICATED
PLANK VARIES
LADDER JACK
( SECURE PLANK TO BOTH
LADDER JACKS)
SECURE TOP AND
BOTTOM OF BOTH
LADDERS
HEIGHT
JACK INSTALLED ON SIDE
OF LADDER TOWARD
SURFACE
JACK INSTALLED ON SIDE
OF LADDER AWAY FROM
SURFACE
UPPERMOST USABLE
RUNG— SECOND
HIGHEST
BUILDING
STRUCTURE
ANCHOR
WINDOW OPENING
Figure 23
Float or Ship Scaffold [ 29 CFR 1926.452( s); 29 CFR 1910.28( u)]
Figure 24
Pump Jack Scaffold [ 29 CFR 1926.452( j)]
21
STRUCTURAL MEMBER
SUPPORT ROPE
EDGE PROTECTION
DECK WITH BRACING
POLE
BRACE
END
GUARDRAIL
SYSTEM
WORK PLATFORM
PUMP JACK
BRACKET
BRACE
MUD SILLS
TOEBOARD
MIDRAIL
WORKBENCH
( GUARDRAIL)
POLE
STRUCTURE
22
4
Types of Scaffolds and Information Regarding Their Use
There are many different types of scaffolds, each with unique features. Because of this distinctiveness,
procedures for safe erection and use maybe unique to the particular scaffold. Guidelines for several scaf-folds
are offered in this part. They are grouped under three categories: self- supporting scaffolds, suspen-sion
scaffolds and special use scaffolds.
Self- Supporting Scaffolds
A self- supporting scaffold is one or more work platforms supported from below by outriggers, brackets,
poles, legs, uprights, posts, frames or similar supports.
General Requirements
Confirm that scaffold and assembly are capable of supporting their own weight and at least four times
the maximum intended load applied or transmitted to the scaffold and components. Ensure that poles,
legs, posts, frames and uprights bear on base plates and mud sills or other adequately firm foundations.
Footings must be level, sound and able to support the loaded scaffold without settlement or displacement.
Plumb or brace poles, legs, posts, frames and uprights to prevent swaying or displacement.
Any supported scaffold with a height of more than four times the minimum width of the base must be
restrained from tipping by guying, tying, bracing or other suitable means. Restraints are needed for every
26' ( vertically), with the top restraint as close to the top platform as possible ( but not further from the top
than four times the least base dimension).
Fabricated Frame
A fabricated frame scaffold ( tubular welded frame scaffold) is a supported scaffold consisting of a plat-form(
s) supported on fabricated end frames with integral posts, horizontal bearers and intermediate
members ( see figure 4).
Frames and panels must be supported by cross, horizontal or diagonal braces, or a mixture of braces, to
stabilize vertical members. Crossbraces should be long enough to square and align vertical members, to
produce an erect scaffold that is plumb, level and square. Brace connections must be securely fastened.
Frames and panels must be connected vertically by coupling, stacking pins, or equal means. Brackets sup-porting
cantilevered loads must be seated with side- brackets parallel to the frames and end- brackets at 90
degrees to the frames. If loads are to be placed on a platform extension, the scaffold must be restrained
from tipping and putlogs or knee brace extensions must be used. ( Excessive loads on side brackets could
cause a frame leg failure.) Existing platforms must be left in place until new end frames have been placed
and braced, prior to moving the platforms to the next level. Scaffolds over 125' high must be designed by a
registered professional engineer and be constructed and loaded consistent with the design.
Tube and Coupler
A tube and coupler scaffold is a supported scaffold consisting of platforms supported by individual
pieces of tubing, erected with coupling devices connecting uprights, braces, bearers and runners ( see fig-ure
3). A registered professional engineer may need to be consulted about the design, construction, and
loading of the scaffold. Tube and coupler scaffolds over 125' high must be designed by a registered profes-sional
engineer and be constructed and loaded consistent with the design.
Transverse bracing forming an “ X” across the width of the scaffold must be installed at the scaffold
ends and at least at every third set of posts horizontally ( measured from only one end) and every fourth
runner vertically. Bracing must extend diagonally from the inner or outer posts or runners upward to the
next outer or inner posts or runners. Building ties must be installed at the bearer levels between the
transverse bracing and must conform to the requirements of 1926.451( c)( 1). This bracing must be placed
for each section of six levels between the fourth and sixth levels. The bracing must extend diagonally
from the inner or outer posts or runners at the bottom of the fourth level, upward to the inner or outer
posts or runners at the bottom of the fifth level, and likewise to the sixth level. If this technique is used,
the scaffold should be tied at the “ k” function level.
On straight run scaffolds, longitudinal bracing across the inner and outer rows of posts must be
installed diagonally in both directions and must extend from the base of the end posts upward to the top
of the scaffold at approximately a 45 degree angle. When the length of the scaffold is greater than the
height, such bracing must be repeated starting at least with every fifth post. When the length is shorter
than the height, such bracing must be installed from the base of end posts upward to the opposite end
posts and then in alternating directions until the top of the scaffold is reached.
In situations where the attachment of bracing to posts is precluded, the bracing must be attached to
the runners. Bearers must be installed transversely between the posts, and when coupled to the posts,
the inboard coupler must bear directly on the runner coupler. When the bearers are coupled to the run-ners,
the couplers must be as close to the posts as possible. Bearers must extend beyond the posts and
runners and provide full contact with the coupler.
The scaffold must have runners installed along its length along both the inside and outside posts at the
various level heights. Runners must be interlocked on straight runs to create continuous lengths and be
coupled to each post. Bottom runners should be located as close to the base as possible. Couplers must be
made of structural metal. When platforms are being moved to the next level, the existing platform must
be left undisturbed until new bearers have been set in place and braced prior to receiving the new plat-forms.
Mobile
A mobile scaffold is a powered or nonpowered, portable, caster or wheel- mounted supported scaffold
( see figure 5). Mobile scaffolds constructed of tube and coupler components or of fabricated frames must
conform to design, construction and loading requirements for those scaffolds. The scaffolds must be
braced by cross, horizontal or diagonal braces, or combination thereof, to prevent racking or collapse; ver-tical
members must be secured together laterally so that vertical members are squared and aligned.
Cross, horizontal or diagonal braces, or a combination, must be used to prevent collapse and secure verti-cal
members laterally so that vertical members are squared and aligned.
Scaffolds must be plumb, level and squared. All brace connections must be secured. Platforms should
not extend past the base supports unless outrigger frames or equivalent devices are used to ensure stabil-ity.
A rolling scaffold load capacity is also limited by the weight its casters can support. Platforms should
not extend past the base supports unless outrigger frames are used. A rolling scaffold load capacity is also
limited by the weight its casters can support.
Caster and wheel stems must be pinned or otherwise secured in scaffold legs. While in a stationary
position, casters and wheels must be locked with a positive wheel and/ or wheel and swivel locks, or equiv-alent
means, to prevent movement.
Employees should not be allowed to ride on a mobile scaffold unless strict controls are followed ( level
and unobstructed surfaces, a height ratio to width of not more than two to one, slow speed of movement,
confinement of employees within the scaffold frame, etc.) When manual force is used to move the scaffold,
the force should be applied as close to the base as practicable, but not more than 5' above the supporting
surface ( i. e., scaffold base or wheels when a powered system is used). Powered systems used to propel
mobile scaffolds must be designed for such use. Forklifts, trucks, similar motor vehicles or add- on motors
should not be used to propel scaffolds unless the scaffold is designed for such propulsion systems.
Pole Scaffold
A single pole scaffold is a supported scaffold consisting of platforms resting on bearers, the outside
ends of which are supported on runners ( ledgers or ribbons) secured to a single row of posts or uprights,
and the inner ends of which are supported on or in a structure or building wall. A double pole ( indepen-dent
pole) scaffold is a supported scaffold consisting of platforms resting on cross beams supported by
ledgers and a double row of uprights independent of support ( except for ties, guys and braces) from any
structure.
23
On double pole scaffolds, crossbracing must be installed between the inner and outer sets of poles ( see
figure 2). Diagonal bracing in both directions must be installed across the entire outside face of double-pole
scaffolds used to support loads equivalent to a uniformly distributed load of 50 pounds or more per
square foot.
On both double and single pole scaffolds, diagonal bracing must be installed across the entire outside
face. Runners and bearers shall be installed on the edges ( e. g., narrow side on a 2" x 4", the edge would be
the 2" side). Bearers must extend a maximum of 3" over the outside edges of runners. Runners must
extend over a minimum of two poles and be supported by bearing blocks securely attached to the poles.
Braces, bearers and runners cannot be spliced between poles. Where wooden poles are spliced, the ends
must be squared and the upper sections must rest squarely on the lower sections. When platforms are
being moved to the next level, the existing platforms must be left undisturbed until the new bearers have
been set in place and braced, prior to receiving the new platforms.
Pole scaffolds over 60' in height must be designed by a registered professional engineer and must be
constructed and loaded in accordance with that design.
Bricklayer’s Square
A bricklayer’s square scaffold is a supported scaffold composed of framed squares that support a plat-form
( see figure 16). These types scaffolds must not exceed three tiers in height and be so constructed and
arranged that one square rests directly above the other.
Scaffolds made of wood must be reinforced with gussets on both sides of each corner. Diagonal braces
must also be installed between squares on the rear and front sides of the scaffold and must extend from
the bottom of each square to the top of the next square. The upper tiers of the scaffold must stand on a
continuous row of planks laid across the next lower tier and nailed down or otherwise secured to prevent
displacement.
Suspension Scaffolds
A suspension scaffold is one or more platforms suspended by ropes or other non- rigid means from an
overhead structure( s).
General Requirements
Each scaffold and scaffold component must be capable of supporting, without failure, its own weight
and at least four times the maximum intended load applied or transmitted to it. Each suspension rope,
including connecting hardware, used on non- adjustable suspension scaffold must be capable of support-ing,
without failure, at least six times the maximum intended load applied or transmitted to that rope.
The stall load of any scaffold must not exceed three times its rated load.
Criteria for suspension scaffolds. All suspension scaffold support devices must rest on surfaces
capable of supporting at least four times the load imposed on them by the scaffold operating at the rated
load of the hoist ( or at least 1.5 times the load imposed on them by the scaffold at the stall capacity of the
hoist, whichever is greater). The scaffold support devices are those such as outrigger beams, cornice
hooks, parapet clamps and similar devices. Suspension scaffold outrigger beams, when used, must be
made of structural metal or equivalent strength material and must be restrained to prevent movement.
The inboard ends of suspension scaffold outrigger beams must be stabilized by bolts or other direct con-nections
to the floor or roof deck, or they must have their inboard ends stabilized by counterweights.
However, masons’ multi- point adjustable suspension scaffold outrigger beams must not be stabilized by
counterweights. Tiebacks must be used to secure outrigger beams that are not stabilized by bolts or other
direct connections to the floor or roof deck. Tiebacks must be equivalent in strength to the suspension ropes.
Before the scaffold is used, a competent person must evaluate direct connections to confirm that the
supporting surfaces are capable of supporting the loads to be imposed. In addition, as related to masons
multi- point adjustable suspension scaffold, connections must be designed by an engineer experienced in
such scaffold design.
24
Counterweights must be secured by mechanical means to the outrigger beams to prevent accidental
displacement; counterweights must not be removed from an outrigger beam until the scaffold is disas-sembled.
Support devices such as cornice hooks, roof hooks, roof irons, parapet clamps or similar devices must be
made of steel, wrought iron or materials of equivalent strength. They must be supported by bearing
blocks and secured against movement by tiebacks installed at right angles to the face of the building or
structure. Sound points of anchorage include structural members, but do not include standpipes, vents,
other piping systems or electrical conduit. Tiebacks must be equivalent in strength to the hoisting rope.
Suspension scaffold power- operated hoists and manual hoists must be tested and listed by a qualified
testing laboratory. Gasoline powered equipment and hoists must not be used on suspension scaffolds.
Gears and brakes of power- operated hoist used on suspension scaffolds must be enclosed.
In addition to the normal operating brake, suspension scaffold power- operated hoists and manually
operated hoists must have a braking device or locking pawl that engages when the hoist exceeds normal
descent speed ( makes either an instantaneous change in momentum or an accelerated over- speed).
Manually operated hoists require a positive crank force to descend. At least four wraps of suspension rope
must be maintained at the lowest point of scaffold travel when winding drum hoists are used. When other
types of hoists are used, the suspension ropes must be of sufficient length to allow the scaffold to be low-ered
without the rope end passing through the hoist, or the rope end must be designed to prevent the end
from passing through the hoist.
Suspension ropes supporting adjustable suspension scaffolds must be of a diameter large enough to
provide sufficient surface area for proper functioning of brake and hoist mechanisms. Wire suspension
rope may only be joined together by eye splice thimbles connected with shackles or coverplates and bolts.
Load ends of wire suspension ropes must be equipped with proper size thimbles and secured by eye- splic-ing
or equivalent means. Swaged attachments or spliced eyes on wire suspension rope must be made by a
wire rope manufacturer or qualified person. Wire rope clips must be retightened after initial loading and
inspected and retightened regularly. Repair of a defective or damaged wire rope is prohibited.
Single- point Adjustable ( Boatswain’s Chairs)
A single- point adjustable suspension scaffold is a suspension scaffold consisting of a platform suspend-ed
by one rope from an overhead support and equipped with means to permit the movement of the plat-form
to desired work levels ( see figure 14).
The supporting rope for the scaffold must remain vertical from the scaffold and suspension device.
Tackle for a boatswain’s chair must have the correct size ballbearing or bushed blocks and properly eye-spliced
first grade manila rope of at least 5⁄ 8". Seat slings must be reeved through four corner holes in the
seat, crossed on the underside of the seat and rigged to prevent slippage. Seat slings must be of at least
5⁄ 8" fiber or synthetic rope or its equivalent, except when employees are using a heat producing process
( e. g., gas or arc welding), then wire rope of at least 3⁄ 8" must be used. Boatswain’s chairs that are not cross-laminated
wood must be reinforced on the underside by cleats to prevent splitting.
When two single- point suspension scaffolds are joined to create a two- point suspension scaffold, the
scaffold must meet the requirements of a two- point scaffold. Powered single- point adjustable scaffolds
will require the use of a minimum 5⁄ 16" diameter wire rope and hoists rated by a nationally recognized lab-oratory.
Two- point Adjustable ( Swing Stage)
A two- point suspension scaffold ( swing stage) is a suspension scaffold consisting of a platform support-ed
by hangers ( stirrups) suspended by two ropes from overhead supports and equipped with means to
permit the raising and lowering of the platform to desired work levels ( see figure 9).
Platforms may not be more than three feet wide unless designed by a qualified person to prevent
unstable conditions. Platforms can be ladder- type, plank- type, beam- type, light metal- type or modular-truss
type. The light metal- type should be tested and listed by a nationally recognized laboratory.
25
Platforms must be secured to hangers ( stirrups) by U- bolts or equivalent means. The blocks for fiber
and synthetic ropes must consist of a minimum of one double and one single block. The sheaves must fit
the size of rope. The scaffolds must be tied or secured by other means to prevent swaying.
Scaffolds specially designed as two- point scaffolds may not be connected together during raising and
lowering operations. Two- point scaffolds designed for use in multiple- point scaffolds can be bridged
together if the connections are articulated and the hoist is seized properly. Passage between one platform
to another is permissible only when the platforms are at the same height, closely abutted, and walk-through
stirrups specially designed for this purpose are used.
Multiple- point Adjustable
A multiple- point adjustable suspension scaffold is a suspension scaffold consisting of a platform( s) sus-pended
by more than two ropes from overhead supports and equipped with means to permit the raising
and lowering of the platform to desired work levels ( see figure 10).
A stone setter’s multiple- point adjustable suspension scaffold is a two- point or multiple- point adjustable
suspension scaffold designed and used for stone setting operations. A mason’s adjustable suspension scaffold
is a two- point or multiple- point adjustable suspension scaffold designed and used for masonry operations.
Two or more scaffolds may not be bridged together unless specially designed to be bridged, the bridge
connections are articulated, and the hoists are seized properly. If bridges are not used, passage may be
made from one platform if the platforms are at the same height and closely abutted. Scaffolds must be
suspended from metal outriggers, iron brackets, wire rope slings, iron hooks or equal means. Scaffold con-nections
for mason’s adjustable suspension scaffolds must be designed by an engineer experienced in scaf-fold
design.
Multi- level
A multi- level suspended scaffold is a two- point or multiple- point adjustable suspension scaffold with a
series of platforms at various levels supported by common stirrups ( see figure 11). Such scaffolds must have
added independent support lines equal to the number of points supported and equal in strength to the sus-pension
lines. Independent support lines and suspension ropes may not be attached to the same anchorage
points. Platform supports must be attached to the support stirrup and not to any other platform.
Catenary
A catenary scaffold is a suspension scaffold consisting of a platform fastened to two essentially hori-zontal
and parallel ropes, which are secured to structural members. Horizontal ropes are usually sup-ported
by intermediate vertical pickup ropes to reduce sag and anchorage load ( see figure 20). Only one
platform may be placed between consecutive vertical pickups and no more than two platforms maybe
used.
Wire rope supported platforms must have hook- shaped stops on each end. Hooks must be situated to
prevent the platform from falling in the event that one wire rope breaks. Supporting ropes should be
equal to 1⁄ 2" improved plow steel wire rope. Care must be taken to prevent overtightening of wire ropes,
which can cause excessive force at anchorages and overstressing by the scaffold load. Wire ropes must be
continuous without splices between anchors.
Float ( Ship)
A float ( ship) scaffold is a suspension scaffold consisting of a braced platform resting upon two parallel
bearers and hung from overhead supports by ropes of fixed length ( see figure 23).
The platform must be supported by at least two bearers, each projecting a minimum of six inches
beyond the platform. Support ropes must be equal in strength to at least 1" first grade manila rope.
Rope connections must be made to ensure that the platform will not shift or slip. If only two ropes are
used for each float, they must be arranged to supply four ends, which are securely attached to overhead
supports. Each supporting rope must be hitched around one end of the bearer and pass under the plat-form
to the other end of the bearer where it is hitched again, leaving sufficient rope at each end for the
supporting ties.
26
Interior Hung
An interior hung scaffold is a suspension scaffold consisting of a platform suspended from the ceiling or
roof structure by fixed length supports ( see figure 19).
Such scaffolds are to be suspended only from the roof structure or other structural members ( e. g., ceiling
beams). Overhead supporting members require inspection for strength before scaffold erection. Suspension
ropes and cable must be connected to the supporting members by shackles, clips, thimbles or equal means.
Needle Beam
A needle beam scaffold is a suspension scaffold consisting of a platform supported by needle beams ( see
figure 18).
Scaffold support beams must be installed on the edges ( narrow side). Ropes and hangers must be used
for support, with the exception that one end of the scaffold can be supported by a solid, permanent struc-tural
member. Support ropes must be equal in strength to at least 1" first grade manila rope. Ropes must
be securely attached to needle beams. The support connection must be arranged to prevent the needle
beam from rolling or being displaced. Platforms must be securely attached to needle beams by bolts or
equal means.
Special Use Scaffolds
Scaffolds and assembly must be capable of supporting their own weight and at least four times the
maximum intended load applied or transmitted to the scaffold and components.
Form and Carpenter Bracket
A form scaffold is a supported scaffold consisting of a platform supported by brackets attached to a
formwork. A carpenter’s bracket scaffold is a supported scaffold consisting of a platform supported by
brackets attached to building or structural walls.
Each bracket must be attached to the supporting formwork or structure by means of nails, a metal stud
attachment device, welding or hooking each bracket over a secured structural supporting member with
the form walers bolted to the form or fastened by snap ties or tie bolts extending through the form and
securely anchored. On carpenter’s bracket scaffolds, the tie bolts can extend through the opposite side of
the structure’s wall ( see figure 15). Wooden bracket form scaffolds must be an integral part of the form
panel. Folding metal brackets must be bolted or secured with a locking pin.
Roof Bracket
A roof bracket scaffold is a rooftop supported scaffold consisting of a platform supported by triangular
shaped supports.
Brackets must conform to the pitch of the roof and produce a level support for the platform. Brackets
should be secured in place by nails. When nails are not practical, brackets should be anchored by 3⁄ 4" first
grade manila rope or its equivalent.
Outrigger
An outrigger scaffold is a supported scaffold consisting of a platform supported by outrigger beams
( thrustouts) projecting beyond the wall or face of a building or structure with the inboard ends secured
inside the building or structure ( see figure 7).
An outrigger scaffold and components must be constructed and loaded according to specific configura-tions
of the required standards or designed by a registered professional engineer and built and loaded
according to the design.
The length of the outrigger beams may not be less than 11⁄ 2 times the length of the outboard end mea-sured
from the fulcrum point to the extreme point of anchorage. The beams must rest on the edge ( narrow
side) with the sides plumb and the edges horizontal. The fulcrum point is to rest on secure six- inch bear-ings.
Beams must be secured to prevent movement and braced at the fulcrum point to prevent tipping.
27
Inboard ends must be securely anchored by braced struts bearing against sills contacting overhead
beams or the ceiling, or tension members secured to the floor joists underfoot, or both, as necessary. The
supporting structure must be braced to eliminate any horizontal movement. Platform units must be
nailed, bolted or otherwise firmly affixed to outriggers. The front end of the platform must be positioned
no more than three inches from the structure.
Pump Jack
A pump jack scaffold is a supported scaffold consisting of a platform supported by vertical poles and
movable support brackets ( see figure 24).
Brackets, braces and accessories for pump jack scaffolds must be fabricated from metal plates and
angles. Two positive gripping devices are required for each bracket. Poles must be secured to structures
by rigid triangular bracing or its equivalent at the bottom, top, and other points.
When it is necessary to raise the platform, crossbracing must be added about four feet on the side oppo-site
the pump jack brace and be left in place until the pump jack has been moved and the initial brace
has been reinstalled. If wood poles are used, the lumber must be straight- grained, free of shakes and
large loose or dead knots and other imperfections that may reduce the strength of the wood. If two consec-utive
lengths are used to form the wood poles, the poles are to be connected together with the seam paral-lel
to the bracket. If 2" x 4" lumber is used to create a pole, the splices must be strong enough to maintain
the full strength of the member. Workbenches may not be used as scaffold platforms.
Ladder Jack
A ladder jack scaffold is a supported scaffold consisting of a platform supported by brackets attached to
ladders ( see figure 21).
The maximum allowable height for a ladder jack scaffold is 20 feet. Only manufactured ladders may be
used. Ladders must meet required standards. Ladders supporting ladder jacks must be situated, fastened
or contain devices to prevent slipping. The ladder jack must be designed and used so that it bears only on
the side rails or only on the ladder rungs. If on the rungs, the contact on each rung must be a minimum of
10 inches. Platforms must be at least 12 inches wide and may not be bridged one to another.
Window Jack
A window jack scaffold is a supported scaffold consisting of a platform supported by a bracket or jack
that projects through a window opening ( see figure 22).
Window jack scaffolds must be securely attached to window openings. Use should be restricted to the
work only at the window opening. Jacks may not be used to support other types of scaffolding and planks
or platforms placed between one window jack and another window jack.
Horse
A horse scaffold means a supported scaffold consisting of a platform supported by construction horses
( see figure 17).
Horse scaffolds must be built to a height of no more 10 feet or two tiers, whichever is less. When tiers
are used, each horse must be placed immediately over the horse of the lower tier. The legs of each horse
must be nailed to prevent dislocation. Each tier must be crossbraced.
Crawling Boards
A crawling board ( chicken ladder) is a supported scaffold consisting of a plank with cleats spaced and
secured to provide footing for use on sloped surfaces such as roofs.
During roof construction or repair or maintenance, crawling boards must extend from the roof peak to
the eaves. Crawling boards must be secured to the roof by ridge hooks or equal means.
Step, Platform and Trestle Ladder
A step, platform and trestle ladder scaffold is a supported scaffold consisting of a platform supported
directly on the rungs of step ladders or a building wall.
28
Platforms may not be placed higher than the second highest rung or step of the supporting ladder.
Ladders must be located, secured or contain devices to avert slipping. Scaffolds may not be bridged one to
another.
Aerial Lifts
General requirements: Aerial lifts include the following types of vehicle- mounted aerial devices used
to elevate personnel to job- sites above ground: extensible boom platforms, aerial ladders, articulating
boom platforms, vertical towers and a combination of any of this equipment. Aerial equipment may be
made of metal, wood, fiberglass reinforced plastic ( FRP) or other material. It may be powered or manually
operated. Such equipment and/ or devices are deemed to be aerial lifts whether or not they are capable of
rotating about a substantially vertical axis. Aerial lifts acquired for use on or after Jan. 22, 1973, must be
designed and constructed in conformance with the applicable requirements of American National
Standards for “ Vehicle Mounted Elevating and Rotating Work Platforms,” ANSI A92.2- 1969, including
appendix.
Aerial lifts may be “ field modified” for uses other than those intended by the manufacturer provided
the modification has been certified in writing by the manufacturer or by any other equivalent entity ( such
as a nationally recognized testing laboratory). The modification( s) to aerial lifts should be done in manner
to be in conformity with all applicable provisions of ANSI A92.2- 1969 and appropriate section of OSHA
standards ( i. e., 1926.453) to be at least as safe as the equipment was before modification.
Specific requirements:
Ladder trucks and tower trucks. Aerial ladders must be secured in the lower traveling position by
the locking device on top of the truck cab/ and the manually operated device at the base of the ladder
before the truck is removed for the highway travel.
Extensible and articulating boom platforms. Lift controls must be tested each day prior to use to
determine that such controls are in safe working condition. Only authorized individuals can operate an
aerial lift. Belting off to an adjacent pole, structure or equipment while working from an aerial lift is not
permitted. Employees are required to always stand firmly on the floor of the basket. The employee must
not sit or climb on the edge of the basket or use planks, ladders or other devices for a work position. A
body belt must be worn and a lanyard attached to the boom or basket when working from an aerial lift.
( Note: Body belt( s) can serve as a positioning device; body belts are not acceptable as part of a personal
fall arrest system.)
Boom and basket load limits specified by the manufacturer must not be exceeded. The brakes must be
set and when outriggers are used, they must be positioned on pads or a solid surface. Wheel chocks must
be installed before using an aerial lift on an incline, provided they can be safely installed. An aerial lift
truck must not be moved when the boom is elevated in a working position with men in the basket, except
for equipment that is specifically designed for this type of operation.
Articulating boom and extensible boom platforms, primarily designed as personnel carriers, must have
both platform ( upper) and lower controls. Upper controls must be in or beside the platform within easy
reach of the operator. Lower controls must provide for overriding the upper controls. Controls must be
plainly marked as to their function. Lower level controls must not be operated unless permission has
been obtained from the employee in the lift, except in case of emergency. Climbers cannot be worn while
performing work from an aerial lift. The insulated portion of an aerial lift must not be altered in any
manner that might reduce its insulating value. Before moving an aerial lift for travel, the boom( s) must
be inspected to see that it is properly cradled and outriggers are in stowed position ( except as permitted
otherwise by this section of the safety standard).
29
Glossary
Aerial Device. Any vehicle mounted, telescoping or articulating, or both, used to position personnel
( workers).
Aerial Ladder. An aerial device consisting of a single- or multiple- section extensible ladder.
Articulating Boom Platform. An aerial device with two or more hinged boom sections.
Bearer. A horizontal transverse scaffold member ( which may be supported by ledgers or runners) upon
which the scaffold platform rests and joins scaffold uprights, posts, poles and similar members.
Brace. A tie that holds one scaffold member in a fixed position with respect to another member. Brace
also means a rigid type of connection holding a scaffold to a building or structure.
Cleat. A structural member used at the ends of platform units to prevent the units from slipping off
their supports. Cleats are also used to provide footing on sloped surfaces such as crawling boards.
Coupler. A device for locking together the component tubes of a tube and coupler scaffold.
Equivalent. An alternative design, material or method that the employer can demonstrate will provide an
equal or greater degree of safety for employees than the method or item specified in the standard.
Extensible Boom Platform. An aerial device ( except ladders) with a telescopic or extensible boom.
Telescopic derricks with personnel platform attachments are considered to be extensible boom platforms
when used with a personnel platform.
Harness. A design of straps that is secured about the employee in a manner to distribute the arresting
forces over at least the thighs, shoulders and pelvis, with provisions for attaching a lanyard, lifeline or
deceleration device.
Hoist. A mechanical device to raise or lower a suspended scaffold. It can be mechanically powered or
manually operated.
Insulated Aerial Device. An aerial device designed for work on energized lines and apparatus.
Ladder Stand. A mobile, fixed- size, self- supporting ladder that appears as a wide flat tread ladder in
the form of stairs.
Ledger. A horizontal scaffold member upon which bearers rest. It is the longitudinal member that joins
scaffold uprights, posts, poles and similar members.
Maximum Intended Load. The total load of all employees, equipment, tools, materials, transmitted
loads, wind loads, and other loads reasonably anticipated to be applied to a scaffold or scaffold component
at any one time.
Mechanically Powered Hoist. A hoist that is powered by other than human energy.
Outrigger. The structural member of a supported scaffold used to increase the base width of a scaffold
in order to provide greater stability for the scaffold.
Outrigger Beam. The structural member of a suspension scaffold or outrigger scaffold that provides
support for the scaffold by extending the scaffold point of attachment to a point out and away from the
structure or building.
Personal Fall Arrest System. A system used to arrest an employee in a fall from a working level. It con-sists
of an anchorage, connectors, a body belt or body harness and may include a lanyard, deceleration
device, lifeline or suitable combinations of these. The use of a body belt for fall arrest is prohibited.
Platform. The horizontal working surface of a scaffold.
Platform. Any personnel- carrying device ( basket or bucket) that is a component of an aerial device.
Platform Unit. The individual wood planks, fabricated planks, fabricated decks and fabricated platforms
that compose the platforms and walkways of a scaffold.
30
Positioning Device System. A body belt or body harness system rigged to allow an employee to be sup-ported
on an elevated vertical surface, such as a wall, and work with both hands free while leaning.
Runner. The lengthwise horizontal bracing or bearing member that supports bearers on tube and cou-pler
scaffolds.
Scaffold. Any temporary elevated or suspended platform and its supporting structure used for supporting
employees or materials or both, except this term does not include crane or derrick suspended personnel plat-forms.
Scissor Lift. A self- propelled or manually propelled lifting personnel platform ( within wheel base) capa-ble
of vertical movement with onboard controls as defined by ANSI/ SIA A92.6- 1990.
Vertical Pickup. A rope used to support the horizontal rope in catenary scaffolds.
Walkway. A portion of a scaffold platform used only for access and is not a work level.
Work Level. An elevated platform used for supporting employees and their materials where work activi-ties
are performed.
31
References
Cloe, William W. May 1979. Occupational Fatalities Related to Scaffolds as Found in Reports of OSHA
Fatality/ Catastrophe Investigations. U. S. Department of Labor, Occupational Safety and Health Administration.
Construction Safety Association of Ontario. September/ October 1990. “ Suspended Access.” Construction Safety.
Construction Safety Association of Ontario.
Ellis, Nigel J. January 1983. “ Suspended Scaffolding: Proper Protection Reduces Fall Injuries.” Occupational
Health & Safety.
“ Fall Protection.” July 1990. Construction Safety. Construction Safety Association of Ontario.
Hinson, J. R. October 1988. “ Careful Selection, Use of Scaffolds Imperative to Accident Prevention.” Occupational
Health and Safety.
International Labor Organization. 1983. “ Scaffolding.” Encyclopedia of Occupational Health & Safety, vol. II, L– Z,
International Labor Organization.
Kliwinski, D. P. October 1988. “ Elevated Workplaces: Ladders and Scaffolds.” Center for Excellence in
Construction Safety Newsletter. West Virginia University, Center for Excellence in Excavation. Morgantown, WV.
National Safety Council. 1980. Accident Prevention Manual for Industrial Operations. 8th ed. Edited by F. E.
McElroy. Chicago: NSC.
N. C. Department of Labor. 1999. North Carolina Occupational Safety and Health Standards for General Industry.
Subpart D— Walking- Working Surfaces; Subpart F— Powered Platforms, Manlifts, and Vehicle- Mounted Work
Platforms. N. C. Department of Labor, Occupational Safety and Health Division. Raleigh.
N. C. Department of Labor. 1994. North Carolina Occupational Safety and Health Standards for the Construction
Industry. Subpart L— Scaffolding. N. C. Department of Labor, Occupational Safety and Health Division. Raleigh.
Potts, D. L. 1985. “ An Assessment of Carpenter’s Injury Risks Needing Research.” NIOSH Report: DSR- 85- 0458
O. M. National Constructors Association.
Potts, D. L. Spring 1991. “ Fall Prevention and Protection.” Excel, vol. 4, no. 3. West Virginia University, Center for
Excellence in Construction Safety. Morgantown, WV.
U. S. Department of Labor, OSHA 3150, 2000 ( Reprinted); A Guide to Scaffold Use in the Construction Industry.
U. S. Department of Labor. May 1983. “ Survey of Scaffold Accidents Resulting in Injuries, 1978.” U. S. Department
of Labor, Bureau of Labor Statistics.
32
The following industry guides are available from the N. C. Department of Labor’s Occupational Safety and
Health Division:
1# 1. A Guide to Safety in Confined Spaces
1# 2. A Guide to Procedures of the N. C. Safety and Health Review Commission ( downloadable PDF ONLY)
1# 3. A Guide to Machine Safeguarding
1# 4. A Guide to OSHA in North Carolina
1# 5. A Guide for Persons Employed in Cotton Dust Environments ( downloadable PDF ONLY)
1# 6. A Guide to Lead Exposure in the Construction Industry ( downloadable PDF ONLY)
1# 7. A Guide to Bloodborne Pathogens in the Workplace
1# 8. A Guide to Voluntary Training and Training Requirements in OSHA Standards
1# 9. A Guide to Ergonomics
# 10. A Guide to Farm Safety and Health ( downloadable PDF ONLY)
# 11. A Guide to Radio Frequency Hazards With Electric Detonators ( downloadable PDF ONLY)
# 12. A Guide to Forklift Operator Training
# 13. A Guide to the Safe Storage of Explosive Materials ( downloadable PDF ONLY)
# 14. A Guide to the OSHA Excavations Standard
# 15. A Guide to Developing and Maintaining an Effective Hearing Conservation Program
# 16. A Guide to Construction Jobsite Safety and Health/ Guía de Seguridad y Salud para el Trabajo de Construcción
# 17. A Guide to Asbestos for Industry
# 18. A Guide to Electrical Safety
# 19. A Guide to Occupational Exposure to Wood, Wood Dust and Combustible Dust Hazards ( downloadable PDF ONLY)
# 20. A Guide to Crane Safety
# 23. A Guide to Working With Electricity
# 25. A Guide to Personal Protective Equipment
# 26. A Guide to Manual Materials Handling and Back Safety
# 27. A Guide to the Control of Hazardous Energy ( Lockout/ Tagout)
# 28. A Guide to Eye Wash and Safety Shower Facilities
# 29. A Guide to Safety and Health in Feed and Grain Mills ( downloadable PDF ONLY)
# 30. A Guide to Working With Corrosive Substances ( downloadable PDF ONLY)
# 31. A Guide to Formaldehyde ( downloadable PDF ONLY)
# 32. A Guide to Fall Prevention in Industry
# 32s. Guía de Protección Contra Caídas en la Industria ( Spanish version of # 32)
# 33. A Guide to Office Safety and Health ( downloadable PDF ONLY)
# 34. A Guide to Safety and Health in the Poultry Industry ( downloadable PDF ONLY)
# 35. A Guide to Preventing Heat Stress
# 38. A Guide to Safe Scaffolding
# 40. A Guide to Emergency Action Planning
# 41. A Guide to OSHA for Small Businesses in North Carolina
# 41s. Guía OSHA para Pequeños Negocios en Carolina del Norte ( Spanish version of # 41)
# 42. A Guide to Transportation Safety
# 43. A Guide to Combustible Dusts
Occupational Safety and Health ( OSH)
Sources of Information
You may call 1- 800- NC- LABOR ( 1- 800- 625- 2267) to reach any division of the N. C. Department of Labor; or visit the
NCDOL home page on the World Wide Web: http:// www. nclabor. com.
N. C. Occupational Safety and Health Division
Mailing Address: Physical Location:
1101 Mail Service Center 111 Hillsborough St.
Raleigh, NC 27699- 1101 ( Old Revenue Building, 3rd Floor)
Local Telephone: ( 919) 807- 2900 Fax: ( 919) 807- 2856
For information concerning education, training and interpretations of occupational safety and health standards contact:
Education, Training and Technical Assistance Bureau
Mailing Address: Physical Location:
1101 Mail Service Center 111 Hillsborough St.
Raleigh, NC 27699- 1101 ( Old Revenue Building, 4th Floor)
Telephone: ( 919) 807- 2875 Fax: ( 919) 807- 2876
For information concerning occupational safety and health consultative services and safety awards programs contact:
Consultative Services Bureau
Mailing Address: Physical Location:
1101 Mail Service Center 111 Hillsborough St.
Raleigh, NC 27699- 1101 ( Old Revenue Building, 3rd Floor)
Telephone: ( 919) 807- 2899 Fax: ( 919) 807- 2902
For information concerning migrant housing inspections and other related activities contact:
Agricultural Safety and Health Bureau
Mailing Address: Physical Location:
1101 Mail Service Center 111 Hillsborough St.
Raleigh, NC 27699- 1101 ( Old Revenue Building, 2nd Floor)
Telephone: ( 919) 807- 2923 Fax: ( 919) 807- 2924
For information concerning occupational safety and health compliance contact:
Safety and Health Compliance District Offices
Raleigh District Office ( 313 Chapanoke Road, Raleigh, NC 27603)
Telephone: ( 919) 779- 8570 Fax: ( 919) 662- 4709
Asheville District Office ( 204 Charlotte Highway, Suite B, Asheville, NC 28803- 8681)
Telephone: ( 828) 299- 8232 Fax: ( 828) 299- 8266
Charlotte District Office ( 901 Blairhill Road, Suite 200, Charlotte, NC 28217- 1578)
Telephone: ( 704) 665- 4341 Fax: ( 704) 665- 4342
Winston- Salem District Office ( 4964 University Parkway, Suite 202, Winston- Salem, NC 27106- 2800)
Telephone: ( 336) 776- 4420 Fax: ( 336) 776- 4422
Wilmington District Office ( 1200 N. 23rd St., Suite 205, Wilmington, NC 28405- 1824)
Telephone: ( 910) 251- 2678 Fax: ( 910) 251- 2654
*** To make an OSHA Complaint, OSH Complaint Desk: ( 919) 807- 2796***
For statistical information concerning program activities contact:
Planning, Statistics and Information Management Bureau
Mailing Address: Physical Location:
1101 Mail Service Center 111 Hillsborough St.
Raleigh, NC 27699- 1101 ( Old Revenue Building, 2nd Floor)
Telephone: ( 919) 807- 2950 Fax: ( 919) 807- 2951
For information about books, periodicals, vertical files, videos, films, audio/ slide sets and computer databases contact:
N. C. Department of Labor Library
Mailing Address: Physical Location:
1101 Mail Service Center 111 Hillsborough St.
Raleigh, NC 27699- 1101 ( Old Revenue Building, 5th Floor)
Telephone: ( 919) 807- 2848 Fax: ( 919) 807- 2849
N. C. Department of Labor ( Other than OSH)
1101 Mail Service Center
Raleigh, NC 27699- 1101
Telephone: ( 919) 733- 7166 Fax: ( 919) 733- 6197